Review the problem statement from Codeforces (link will open a new tab). When you've matched your problem, go to the solutions.
Search on plain tags, ratings, names, and problem text. Example: brute force or binary search
< 1 2 3 ... 12 13 14Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 8046 | Make a Palindrome | greedy sortings | Statement | D | EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2) {2124} | PROGRAMMING | 1750.0 | EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2) Editorial | |
| 1404 | Sets of Complementary Sums | combinatorics dp math two pointers | Statement | E | Educational Codeforces Round 181 (Rated for Div. 2) {2125} | PROGRAMMING | Educational Codeforces Round 181 Editorial | ||
| 22611 | Count Good Numbers | combinatorics math number theory | Statement | C | Educational Codeforces Round 181 (Rated for Div. 2) {2125} | PROGRAMMING | Educational Codeforces Round 181 Editorial | ||
| 27197 | Left and Down | greedy math number theory | Statement | B | Educational Codeforces Round 181 (Rated for Div. 2) {2125} | PROGRAMMING | Educational Codeforces Round 181 Editorial | ||
| 50772 | Only One Digit | implementation math | Statement | A | Codeforces Round 1037 (Div. 3) {2126} | PROGRAMMING | 144845 | ||
| 16916 | G-C-D, Unlucky! | math number theory | Statement | E | Codeforces Round 1037 (Div. 3) {2126} | PROGRAMMING | 144845 | ||
| 104 | Inter Active (Hard Version) | binary search bitmasks constructive algorithms graphs implementation interactive math probabilities | Statement | G2 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} | PROGRAMMING | 2750.0 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial | |
| 1051 | Hamed and AghaBalaSar | combinatorics math | Statement | F | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} | PROGRAMMING | 3000.0 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial | |
| 19570 | Mix Mex Max | constructive algorithms greedy math | Statement | A | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} | PROGRAMMING | 500.0 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial | |
| 12190 | Sum of LDS | combinatorics dp math | Statement | D | Codeforces Round 1039 (Div. 2) {2128} | PROGRAMMING | 1750.0 | Codeforces Round #1039 — Editorial | |
| 377 | Strict Triangle | graphs shortest paths | Statement | F | Codeforces Round 1039 (Div. 2) {2128} | PROGRAMMING | 4000.0 | Codeforces Round #1039 — Editorial | |
| 1655 | Interactive RBS (Hard Version) | binary search bitmasks constructive algorithms dp interactive | Statement | C3 | Codeforces Round 1040 (Div. 1) {2129} | PROGRAMMING | 750.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 3835 | Interactive RBS (Easy Version) | binary search bitmasks constructive algorithms interactive | Statement | C1 | Codeforces Round 1040 (Div. 1) {2129} | PROGRAMMING | 750.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 2485 | Interactive RBS (Medium Version) | binary search bitmasks constructive algorithms interactive | Statement | C2 | Codeforces Round 1040 (Div. 1) {2129} | PROGRAMMING | 750.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 28443 | Submission is All You Need | greedy math | Statement | A | Codeforces Round 1040 (Div. 2) {2130} | PROGRAMMING | 500.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 4699 | Unjust Binary Life | binary search binary search data structures greedy greedy math two pointers | Statement | F | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 3735 | Wafu! | bitmasks brute force dp math | Statement | G | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 877 | Sea, You & copriMe | brute force combinatorics constructive algorithms graphs greedy math number theory | Statement | H | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 30839 | Alternating Series | constructive algorithms greedy math | Statement | B | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 38711 | Lever | math | Statement | A | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 21521 | Make it Equal | math number theory | Statement | C | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 8772 | From 1 to Infinity | binary search dp implementation math | Statement | D | Codeforces Round 1043 (Div. 3) {2132} | PROGRAMMING | Codeforces Round 1043 (Div. 3) Editorial | ||
| 13262 | The Cunning Seller (hard version) | binary search greedy math | Statement | C2 | Codeforces Round 1043 (Div. 3) {2132} | PROGRAMMING | Codeforces Round 1043 (Div. 3) Editorial | ||
| 27592 | The Cunning Seller (easy version) | greedy math | Statement | C1 | Codeforces Round 1043 (Div. 3) {2132} | PROGRAMMING | Codeforces Round 1043 (Div. 3) Editorial | ||
| 33352 | The Secret Number | math | Statement | B | Codeforces Round 1043 (Div. 3) {2132} | PROGRAMMING | Codeforces Round 1043 (Div. 3) Editorial | ||
| 7435 | Chicken Jockey | binary search brute force dp greedy math | Statement | D | Codeforces Round 1044 (Div. 2) {2133} | PROGRAMMING | 2250.0 | Codeforces Round 1044 (Div. 2) Editorial | |
| 30849 | Redstone? | brute force implementation math | Statement | A | Codeforces Round 1044 (Div. 2) {2133} | PROGRAMMING | 500.0 | Codeforces Round 1044 (Div. 2) Editorial | |
| 458 | Flint and Steel | data structures dp | Statement | F | Codeforces Round 1044 (Div. 2) {2133} | PROGRAMMING | 3250.0 | Codeforces Round 1044 (Div. 2) Editorial | |
| 26457 | Painting With Two Colors | constructive algorithms implementation math | Statement | A | Codeforces Round 1045 (Div. 2) {2134} | PROGRAMMING | 500.0 | 145832 | |
| 20750 | Add 0 or K | constructive algorithms math number theory | Statement | B | Codeforces Round 1045 (Div. 2) {2134} | PROGRAMMING | 1250.0 | 145832 | |
| 986 | From the Unknown (Hard Version) | binary search brute force constructive algorithms interactive math | Statement | D2 | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 1250.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 241 | Beyond the Palindrome (Easy Version) | combinatorics dp math | Statement | E1 | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 3000.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 155 | Beyond the Palindrome (Hard Version) | combinatorics dp math number theory | Statement | E2 | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 2000.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 7299 | For the Champion | constructive algorithms interactive math | Statement | B | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 1000.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 2409 | From the Unknown (Easy Version) | constructive algorithms interactive math | Statement | D1 | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 1250.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 242 | To the Infinity | data structures hashing math trees | Statement | F | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 4000.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 20822 | Like the Bitset | constructive algorithms greedy two pointers | Statement | B | Codeforces Round 1046 (Div. 2) {2136} | PROGRAMMING | 1000.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 26012 | In the Dream | greedy math | Statement | A | Codeforces Round 1046 (Div. 2) {2136} | PROGRAMMING | 500.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial | |
| 22777 | Maximum Even Sum | brute force greedy implementation math | Statement | C | Codeforces Round 1047 (Div. 3) {2137} | PROGRAMMING | Codeforces Round 1047 (Div. 3) Editorial | ||
| 35132 | Collatz Conjecture | constructive algorithms math | Statement | A | Codeforces Round 1047 (Div. 3) {2137} | PROGRAMMING | Codeforces Round 1047 (Div. 3) Editorial | ||
| 26314 | Fun Permutation | constructive algorithms math number theory | Statement | B | Codeforces Round 1047 (Div. 3) {2137} | PROGRAMMING | Codeforces Round 1047 (Div. 3) Editorial | ||
| 10096 | Mexification | implementation math | Statement | E | Codeforces Round 1047 (Div. 3) {2137} | PROGRAMMING | Codeforces Round 1047 (Div. 3) Editorial | ||
| 633 | Antiamuny and Slider Movement | binary search brute force combinatorics implementation math | Statement | D | Codeforces Round 1048 (Div. 1) {2138} | PROGRAMMING | 2500.0 | Codeforces Round 1048 (Div. 1, Div. 2) Editorial | |
| 16914 | Cake Assignment | bitmasks constructive algorithms | Statement | A | Codeforces Round 1048 (Div. 1) {2138} | PROGRAMMING | 500.0 | Codeforces Round 1048 (Div. 1, Div. 2) Editorial | |
| 25720 | Maple and Multiplication | greedy math | Statement | A | Codeforces Round 1048 (Div. 2) {2139} | PROGRAMMING | 500.0 | Codeforces Round 1048 (Div. 1, Div. 2) Editorial | |
| 22011 | Another Divisibility Problem | constructive algorithms math number theory | Statement | B | Codeforces Round 1049 (Div. 2) {2140} | PROGRAMMING | 1000.0 | Codeforces Round 1049 (Div. 2) Editorial | |
| 4861 | A Cruel Segment's Thesis | greedy math sortings | Statement | D | Codeforces Round 1049 (Div. 2) {2140} | PROGRAMMING | 1750.0 | Codeforces Round 1049 (Div. 2) Editorial | |
| 469 | Avoid Minimums | *special greedy math | Statement | D | Kotlin Heroes: Episode 13 {2141} | PROGRAMMING | Kotlin Heroes 13 Editorial | ||
| 1878 | Make Good | constructive algorithms math strings | Statement | E | Codeforces Round 1051 (Div. 2) {2143} | PROGRAMMING | 2500.0 | Codeforces Round 1051 (Div. 2) Editorial | |
| 411 | Increasing Xor | data structures math | Statement | F | Codeforces Round 1051 (Div. 2) {2143} | PROGRAMMING | 3000.0 | Codeforces Round 1051 (Div. 2) Editorial | |
| 21591 | Cut the Array | brute force math number theory | Statement | A | Educational Codeforces Round 182 (Rated for Div. 2) {2144} | PROGRAMMING | Educational Codeforces Round 182 Editorial | ||
| 6957 | Price Tags | dp math | Statement | D | Educational Codeforces Round 182 (Rated for Div. 2) {2144} | PROGRAMMING | Educational Codeforces Round 182 Editorial | ||
| 3046 | Predicting Popularity | binary search data structures math sortings | Statement | E | Educational Codeforces Round 183 (Rated for Div. 2) {2145} | PROGRAMMING | Educational Codeforces Round 183 Editorial | ||
| 30573 | Candies for Nephews | brute force math | Statement | A | Educational Codeforces Round 183 (Rated for Div. 2) {2145} | PROGRAMMING | Educational Codeforces Round 183 Editorial | ||
| 520 | Cost of Coloring | combinatorics fft math | Statement | G | Educational Codeforces Round 183 (Rated for Div. 2) {2145} | PROGRAMMING | Educational Codeforces Round 183 Editorial | ||
| 6634 | Inversion Value of a Permutation | constructive algorithms dfs and similar dp math | Statement | D | Educational Codeforces Round 183 (Rated for Div. 2) {2145} | PROGRAMMING | Educational Codeforces Round 183 Editorial | ||
| 13232 | Wrong Binary Search | binary search constructive algorithms | Statement | C | Codeforces Round 1052 (Div. 2) {2146} | PROGRAMMING | 1250.0 | Codeforces Round 1052 (Div. 2) Editorial | |
| 353 | Modular Tetration | combinatorics math number theory | Statement | G | Codeforces Global Round 29 (Div. 1 + Div. 2) {2147} | PROGRAMMING | 4500.0 | ||
| 46928 | Sublime Sequence | brute force math | Statement | A | Codeforces Round 1050 (Div. 4) {2148} | PROGRAMMING | Codeforces Round 1050 (Div. 4) Editorial | ||
| 4158 | Farmer John's Last Wish | data structures math number theory | Statement | G | Codeforces Round 1050 (Div. 4) {2148} | PROGRAMMING | Codeforces Round 1050 (Div. 4) Editorial | ||
| 25174 | Pacer | greedy math | Statement | C | Codeforces Round 1050 (Div. 4) {2148} | PROGRAMMING | Codeforces Round 1050 (Div. 4) Editorial | ||
| 4758 | Nezuko in the Clearing | binary search math ternary search | Statement | F | Codeforces Round 1054 (Div. 3) {2149} | PROGRAMMING | __rose | ||
| 40641 | Be Positive | math | Statement | A | Codeforces Round 1054 (Div. 3) {2149} | PROGRAMMING | __rose | ||
| 80 | Counting Is Fun: The Finale | Statement | G | Codeforces Round 1053 (Div. 1) {2150} | PROGRAMMING | 4250.0 | Editorial of Codeforces Round 1053 (Div. 1, Div. 2) | ||
| 749 | Attraction Theory | combinatorics dp implementation math | Statement | D | Codeforces Round 1053 (Div. 1) {2150} | PROGRAMMING | 2500.0 | Editorial of Codeforces Round 1053 (Div. 1, Div. 2) | |
| 6002 | Grid Counting | combinatorics math | Statement | B | Codeforces Round 1053 (Div. 1) {2150} | PROGRAMMING | 1000.0 | Editorial of Codeforces Round 1053 (Div. 1, Div. 2) | |
| 592 | Hidden Single (Version 2) | divide and conquer interactive math probabilities | Statement | E2 | Codeforces Round 1053 (Div. 1) {2150} | PROGRAMMING | 1750.0 | Editorial of Codeforces Round 1053 (Div. 1, Div. 2) | |
| 1012 | Hidden Single (Version 1) | divide and conquer interactive math probabilities sortings | Statement | E1 | Codeforces Round 1053 (Div. 1) {2150} | PROGRAMMING | 2000.0 | Editorial of Codeforces Round 1053 (Div. 1, Div. 2) | |
| 2757 | Monotone Subsequence | brute force constructive algorithms dp graphs interactive math | Statement | E | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} | PROGRAMMING | 3000.0 | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial | |
| 704 | Query Jungle | data structures data structures implementation math math trees | Statement | G | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} | PROGRAMMING | 4000.0 | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial | |
| 12091 | Triple Removal | data structures greedy math | Statement | C | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} | PROGRAMMING | 1500.0 | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial | |
| 12783 | Catching the Krug | games math | Statement | B | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) {2152} | PROGRAMMING | 1500.0 | Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial | |
| 22499 | Bitwise Reversion | bitmasks | Statement | B | Codeforces Round 1057 (Div. 2) {2153} | PROGRAMMING | 750.0 | Codeforces Round 1057 (Div. 2) Editorial | |
| 967 | Zero Trailing Factorial | brute force math number theory | Statement | E | Codeforces Round 1057 (Div. 2) {2153} | PROGRAMMING | 2250.0 | Codeforces Round 1057 (Div. 2) Editorial | |
| 321 | Odd Queries on Odd Array | data structures trees | Statement | F | Codeforces Round 1057 (Div. 2) {2153} | PROGRAMMING | 3250.0 | Codeforces Round 1057 (Div. 2) Editorial | |
| 1195 | No Mind To Think | binary search greedy sortings ternary search two pointers | Statement | E | Codeforces Round 1060 (Div. 2) {2154} | PROGRAMMING | 2500.0 | Codeforces Round 1060 (Div. 2) Editorial | |
| 13422 | No Cost Too Great (Easy Version) | greedy implementation math number theory | Statement | C1 | Codeforces Round 1060 (Div. 2) {2154} | PROGRAMMING | 1250.0 | Codeforces Round 1060 (Div. 2) Editorial | |
| 5467 | No Cost Too Great (Hard Version) | greedy math number theory | Statement | C2 | Codeforces Round 1060 (Div. 2) {2154} | PROGRAMMING | 1000.0 | Codeforces Round 1060 (Div. 2) Editorial | |
| 23043 | Notelock | greedy two pointers | Statement | A | Codeforces Round 1060 (Div. 2) {2154} | PROGRAMMING | 500.0 | Codeforces Round 1060 (Div. 2) Editorial | |
| 2807 | Mimo & Yuyu | games greedy math | Statement | E | Codeforces Round 1056 (Div. 2) {2155} | PROGRAMMING | 2250.0 | Codeforces Round 1056 (Div. 2) Editorial | |
| 25048 | El fucho | implementation math | Statement | A | Codeforces Round 1056 (Div. 2) {2155} | PROGRAMMING | 500.0 | Codeforces Round 1056 (Div. 2) Editorial | |
| 5821 | Batteries | interactive math | Statement | D | Codeforces Round 1056 (Div. 2) {2155} | PROGRAMMING | 2000.0 | Codeforces Round 1056 (Div. 2) Editorial | |
| 20608 | Strange Machine | binary search brute force greedy implementation | Statement | B | Codeforces Round 1061 (Div. 2) {2156} | PROGRAMMING | 750.0 | Codeforces Round 1061 (Div. 2) Editorial | |
| 5337 | Find the Last Number | bitmasks constructive algorithms interactive math | Statement | D | Codeforces Round 1061 (Div. 2) {2156} | PROGRAMMING | 2000.0 | Codeforces Round 1061 (Div. 2) Editorial | |
| 12177 | Maximum GCD on Whiteboard | greedy math number theory | Statement | C | Codeforces Round 1061 (Div. 2) {2156} | PROGRAMMING | 1500.0 | Codeforces Round 1061 (Div. 2) Editorial | |
| 402 | Isaac's Queries | brute force constructive algorithms dfs and similar divide and conquer greedy interactive math probabilities | Statement | G | Codeforces Round 1066 (Div. 1 + Div. 2) {2157} | PROGRAMMING | 3000.0 | Codeforces Round 1066 (Div. 1 + Div. 2) Editorial | |
| 9136 | Meximum Array 2 | constructive algorithms greedy math | Statement | C | Codeforces Round 1066 (Div. 1 + Div. 2) {2157} | PROGRAMMING | 1500.0 | Codeforces Round 1066 (Div. 1 + Div. 2) Editorial | |
| 5935 | Billion Players Game | greedy math sortings ternary search two pointers | Statement | D | Codeforces Round 1066 (Div. 1 + Div. 2) {2157} | PROGRAMMING | 1500.0 | Codeforces Round 1066 (Div. 1 + Div. 2) Editorial | |
| 12756 | Expansion Plan 2 | implementation math | Statement | B | Codeforces Round 1066 (Div. 1 + Div. 2) {2157} | PROGRAMMING | 1000.0 | Codeforces Round 1066 (Div. 1 + Div. 2) Editorial | |
| 3246 | Palindrome Flipping | brute force constructive algorithms implementation strings | Statement | D | Codeforces Round 1067 (Div. 2) {2158} | PROGRAMMING | 2000.0 | Codeforces Round 1067 (Div. 2) Editorial | |
| 209 | Distinct GCDs (Hard Version) | combinatorics constructive algorithms graphs graphs graphs math number theory number theory | Statement | F2 | Codeforces Round 1067 (Div. 2) {2158} | PROGRAMMING | 1000.0 | Codeforces Round 1067 (Div. 2) Editorial | |
| 13794 | Split | constructive algorithms greedy math | Statement | B | Codeforces Round 1067 (Div. 2) {2158} | PROGRAMMING | 1250.0 | Codeforces Round 1067 (Div. 2) Editorial | |
| 23215 | Suspension | greedy math | Statement | A | Codeforces Round 1067 (Div. 2) {2158} | PROGRAMMING | 500.0 | Codeforces Round 1067 (Div. 2) Editorial | |
| 1004 | Inverse Minimum Partition (Easy Version) | binary search data structures dp greedy math two pointers | Statement | D1 | Codeforces Round 1058 (Div. 1) {2159} | PROGRAMMING | 1500.0 | Codeforces Round 1058 Editorial | |
| 1672 | Twin Polynomials | combinatorics graph matchings graphs math | Statement | C | Codeforces Round 1058 (Div. 1) {2159} | PROGRAMMING | 1500.0 | Codeforces Round 1058 Editorial | |
| 388 | Inverse Minimum Partition (Hard Version) | dp greedy | Statement | D2 | Codeforces Round 1058 (Div. 1) {2159} | PROGRAMMING | 1750.0 | Codeforces Round 1058 Editorial | |
| 194 | Super-Short-Polynomial-San | math math meet-in-the-middle meet-in-the-middle | Statement | E | Codeforces Round 1058 (Div. 1) {2159} | PROGRAMMING | 3000.0 | Codeforces Round 1058 Editorial | |
| 17638 | Distinct Elements | greedy math | Statement | B | Codeforces Round 1058 (Div. 2) {2160} | PROGRAMMING | 1000.0 | Codeforces Round 1058 Editorial | |
| 22342 | MEX Partition | math | Statement | A | Codeforces Round 1058 (Div. 2) {2160} | PROGRAMMING | 500.0 | Codeforces Round 1058 Editorial | |
| 774 | Left is Always Right | combinatorics math | Statement | E | Pinely Round 5 (Div. 1 + Div. 2) {2161} | PROGRAMMING | 3000.0 | ||
| 15653 | Round Trip | games greedy implementation math | Statement | A | Pinely Round 5 (Div. 1 + Div. 2) {2161} | PROGRAMMING | 500.0 | ||
| 2795 | Beautiful Tree | constructive algorithms math trees | Statement | G | Codeforces Round 1059 (Div. 3) {2162} | PROGRAMMING | Codeforces Round 1059 (Div. 3) Editorial | ||
| 9067 | Siga ta Kymata | constructive algorithms math | Statement | B | Codeforces Round 1063 (Div. 2) {2163} | PROGRAMMING | 1000.0 | Codeforces Round 1063 Editorial | |
| 8891 | Monopati | dp math two pointers | Statement | C | Codeforces Round 1063 (Div. 2) {2163} | PROGRAMMING | 1250.0 | Codeforces Round 1063 Editorial | |
| 19482 | Souvlaki VS. Kalamaki | math sortings | Statement | A | Codeforces Round 1063 (Div. 2) {2163} | PROGRAMMING | 500.0 | Codeforces Round 1063 Editorial | |
| 4917 | Copy String | binary search greedy implementation strings | Statement | D | Codeforces Global Round 30 (Div. 1 + Div. 2) {2164} | PROGRAMMING | 1750.0 | Codeforces Global Round 30 Editorial | |
| 418 | Chain Prefix Rank (Hard Version) | combinatorics data structures dp math | Statement | F2 | Codeforces Global Round 30 (Div. 1 + Div. 2) {2164} | PROGRAMMING | 1500.0 | Codeforces Global Round 30 Editorial | |
| 643 | Chain Prefix Rank (Easy Version) | combinatorics dfs and similar dp math | Statement | F1 | Codeforces Global Round 30 (Div. 1 + Div. 2) {2164} | PROGRAMMING | 2500.0 | Codeforces Global Round 30 Editorial | |
| 4461 | Marble Council | dp math | Statement | B | Codeforces Round 1064 (Div. 1) {2165} | PROGRAMMING | 1000.0 | 148452 | |
| 17979 | Tab Closing | math | Statement | B | Codeforces Round 1064 (Div. 2) {2166} | PROGRAMMING | 750.0 | Codeforces Round 1064 (Div. 1, Div. 2) Editorial | |
| 8987 | khba Loves to Sleep! | binary search data structures geometry implementation math | Statement | E | Codeforces Round 1062 (Div. 4) {2167} | PROGRAMMING | Arpa Video Tutorial | ||
| 29936 | Yet Another Array Problem | brute force math number theory | Statement | D | Codeforces Round 1062 (Div. 4) {2167} | PROGRAMMING | Arpa Video Tutorial | ||
| 57583 | Square? | math | Statement | A | Codeforces Round 1062 (Div. 4) {2167} | PROGRAMMING | Arpa Video Tutorial | ||
| 3289 | Encode and Decode (Hard Version) | bitmasks interactive math | Statement | A2 | Testing Round 20 (Unrated, Communication Problems) {2168} | PROGRAMMING | Testing Round 20 Editorial (officially unofficial) | ||
| 8453 | Removal of a Sequence (Easy Version) | binary search bitmasks geometry implementation math number theory | Statement | D1 | Educational Codeforces Round 184 (Rated for Div. 2) {2169} | PROGRAMMING | Educational Codeforces Round 184 Editorial | ||
| 2251 | Removal of a Sequence (Hard Version) | binary search constructive algorithms divide and conquer greedy implementation math number theory probabilities | Statement | D2 | Educational Codeforces Round 184 (Rated for Div. 2) {2169} | PROGRAMMING | Educational Codeforces Round 184 Editorial | ||
| 330 | Subsequence Problem | combinatorics dp fft math | Statement | F | Educational Codeforces Round 184 (Rated for Div. 2) {2169} | PROGRAMMING | Educational Codeforces Round 184 Editorial | ||
| 12527 | Range Operation | math two pointers | Statement | C | Educational Codeforces Round 184 (Rated for Div. 2) {2169} | PROGRAMMING | Educational Codeforces Round 184 Editorial | ||
| 19759 | Maximum Neighborhood | greedy math | Statement | A | Educational Codeforces Round 185 (Rated for Div. 2) {2170} | PROGRAMMING | Educational Codeforces Round 185 Editorial | ||
| 14130 | Addition on a Segment | greedy math | Statement | B | Educational Codeforces Round 185 (Rated for Div. 2) {2170} | PROGRAMMING | Educational Codeforces Round 185 Editorial | ||
| 2292 | Sakura Adachi and Optimal Sequences | bitmasks combinatorics greedy math | Statement | G | Codeforces Round 1065 (Div. 3) {2171} | PROGRAMMING | Codeforces Round 1065 (Div. 3) Editorial | ||
| 36953 | Shizuku Hoshikawa and Farm Legs | math | Statement | A | Codeforces Round 1065 (Div. 3) {2171} | PROGRAMMING | Codeforces Round 1065 (Div. 3) Editorial | ||
| 93 | Circles Are Far from Each Other | Statement | C | 2025 ICPC Asia Taichung Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2172} | PROGRAMMING | ||||
| 98 | Divisor Card Game | Statement | D | 2025 ICPC Asia Taichung Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2172} | PROGRAMMING | ||||
| 3824 | Cluster Computing System | Statement | F | 2025 ICPC Asia Taichung Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2172} | PROGRAMMING | ||||
| 834 | Kindergarten Homework | Statement | K | 2025 ICPC Asia Taichung Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2172} | PROGRAMMING | ||||
| 548 | Isla's Memory Thresholds | binary search data structures divide and conquer math | Statement | F | Codeforces Round 1068 (Div. 2) {2173} | PROGRAMMING | 3000.0 | ||
| 3588 | Taiga's Carry Chains | bitmasks brute force dp greedy | Statement | D | Codeforces Round 1068 (Div. 2) {2173} | PROGRAMMING | 1750.0 | ||
| 23605 | Sleeping Through Classes | implementation | Statement | A | Codeforces Round 1068 (Div. 2) {2173} | PROGRAMMING | 500.0 | ||
| 1506 | Shiro's Mirror Duel | interactive probabilities | Statement | E | Codeforces Round 1068 (Div. 2) {2173} | PROGRAMMING | 2250.0 | ||
| 92 | Game of Scientists (Version 2) | brute force chinese remainder theorem interactive math | Statement | E2 | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 1750.0 | Codeforces Round 1069 Editorial | |
| 126 | Game of Scientists (Version 1) | chinese remainder theorem interactive math | Statement | E1 | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 1750.0 | Codeforces Round 1069 Editorial | |
| 447 | Mosaic Tree | combinatorics dp fft math trees | Statement | F | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 3500.0 | Codeforces Round 1069 Editorial | |
| 14103 | Needle in a Haystack | greedy strings two pointers | Statement | A | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 500.0 | Codeforces Round 1069 Editorial | |
| 1136 | Beautiful Patterns (Easy Version) | math probabilities | Statement | C1 | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 1500.0 | Codeforces Round 1069 Editorial | |
| 990 | Beautiful Patterns (Hard Version) | math probabilities | Statement | C2 | Codeforces Round 1069 (Div. 1) {2174} | PROGRAMMING | 500.0 | Codeforces Round 1069 Editorial | |
| 12048 | XOR Array | math | Statement | B | Codeforces Round 1069 (Div. 2) {2175} | PROGRAMMING | 750.0 | Codeforces Round 1069 Editorial | |
| 1463 | Omega Numbers | bitmasks dp math number theory | Statement | F | Codeforces Round 1070 (Div. 2) {2176} | PROGRAMMING | 2750.0 | Codeforces Round 1070 (Div.2) Editorial | |
| 15581 | Odd Process | greedy math sortings | Statement | C | Codeforces Round 1070 (Div. 2) {2176} | PROGRAMMING | 1500.0 | Codeforces Round 1070 (Div.2) Editorial | |
| 25498 | Yes or Yes | brute force greedy strings | Statement | A | Good Bye 2025 {2178} | PROGRAMMING | 500.0 | ||
| 21455 | Impost or Sus | greedy implementation strings | Statement | B | Good Bye 2025 {2178} | PROGRAMMING | 750.0 | ||
| 13361 | Blackslex and Penguin Civilization | bitmasks constructive algorithms greedy math | Statement | D | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 1291 | Blackslex and Plants | bitmasks data structures dp math | Statement | H | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 1196 | Blackslex and Penguin Migration | brute force interactive math | Statement | G | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 5719 | Blackslex and Girls | constructive algorithms geometry math | Statement | E | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 22103 | Blackslex and Number Theory | math number theory sortings sortings | Statement | C | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 34164 | Blackslex and Password | math strings | Statement | A | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 6386 | XOR-factorization | bitmasks constructive algorithms dp greedy number theory | Statement | C | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 1500.0 | Codeforces Global Round 31 | |
| 1725 | No Effect XOR | bitmasks math | Statement | E | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 2000.0 | Codeforces Global Round 31 | |
| 132 | Balance | combinatorics math | Statement | G | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 2750.0 | Codeforces Global Round 31 | |
| 4218 | Insolvable Disks | greedy math | Statement | D | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 1750.0 | Codeforces Global Round 31 | |
| 24451 | Ashmal | greedy strings | Statement | B | Codeforces Global Round 31 (Div. 1 + Div. 2) {2180} | PROGRAMMING | 750.0 | Codeforces Global Round 31 | |
| 628 | Greta's Game | binary search dp math | Statement | G | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 140 | Cacti Classification | binary search interactive math | Statement | C | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 3665 | Alphabet City | binary search math strings | Statement | A | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 697 | Jinx or Jackpot | brute force dp math probabilities | Statement | J | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 132 | LLM Training | math | Statement | L | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 6475 | Honey Cake | math number theory | Statement | H | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 8855 | Christmas Tree Decoration | combinatorics dp greedy math | Statement | D | Educational Codeforces Round 186 (Rated for Div. 2) {2182} | PROGRAMMING | Educational Codeforces Round 186 Editorial | ||
| 10578 | War Strategy | binary search greedy math two pointers | Statement | C | Hello 2026 {2183} | PROGRAMMING | 1500.0 | ||
| 158 | Minimise Cost | dp | Statement | H | Hello 2026 {2183} | PROGRAMMING | 4000.0 | ||
| 2827 | LCM is Legendary Counting Master | dp math number theory | Statement | E | Hello 2026 {2183} | PROGRAMMING | 2250.0 | ||
| 21598 | Huge Pile | binary search math | Statement | C | Codeforces Round 1072 (Div. 3) {2184} | PROGRAMMING | Codeforces Round 1072 (Div. 3) Editorial | ||
| 9343 | Unfair Game | combinatorics dp math | Statement | D | Codeforces Round 1072 (Div. 3) {2184} | PROGRAMMING | Codeforces Round 1072 (Div. 3) Editorial | ||
| 37678 | Social Experiment | math | Statement | A | Codeforces Round 1072 (Div. 3) {2184} | PROGRAMMING | Codeforces Round 1072 (Div. 3) Editorial | ||
| 23834 | Hourglass | math | Statement | B | Codeforces Round 1072 (Div. 3) {2184} | PROGRAMMING | Codeforces Round 1072 (Div. 3) Editorial | ||
| 42342 | Perfect Root | constructive algorithms math | Statement | A | Codeforces Round 1074 (Div. 4) {2185} | PROGRAMMING | Codeforces Round 1074 (Div. 4) Editorial | ||
| 3233 | Mixing MEXes | data structures implementation math | Statement | G | Codeforces Round 1074 (Div. 4) {2185} | PROGRAMMING | Codeforces Round 1074 (Div. 4) Editorial | ||
| 20407 | OutOfMemoryError | data structures implementation math two pointers | Statement | D | Codeforces Round 1074 (Div. 4) {2185} | PROGRAMMING | Codeforces Round 1074 (Div. 4) Editorial | ||
| 609 | Cool Problem | bitmasks brute force divide and conquer dp math | Statement | D | Codeforces Round 1077 (Div. 1) {2187} | PROGRAMMING | 2000.0 | Codeforces Round 1077 (Div. 1, Div. 2) Editorial | |
| 20748 | Seats | greedy | Statement | B | Codeforces Round 1077 (Div. 2) {2188} | PROGRAMMING | 1000.0 | Codeforces Round 1077 (Div. 1, Div. 2) Editorial | |
| 1906 | Little String (Hard Version) | binary search combinatorics dp greedy math number theory | Statement | D2 | Codeforces Round 1075 (Div. 2) {2189} | PROGRAMMING | 750.0 | Codeforces Round 1075 (Div. 2) Editorial | |
| 13730 | XOR Convenience (Easy Version) | bitmasks brute force constructive algorithms math | Statement | C1 | Codeforces Round 1075 (Div. 2) {2189} | PROGRAMMING | 1250.0 | Codeforces Round 1075 (Div. 2) Editorial | |
| 6133 | XOR-convenience (Hard Version) | bitmasks brute force constructive algorithms math | Statement | C2 | Codeforces Round 1075 (Div. 2) {2189} | PROGRAMMING | 750.0 | Codeforces Round 1075 (Div. 2) Editorial | |
| 3895 | Little String (Easy Version) | combinatorics dp math | Statement | D1 | Codeforces Round 1075 (Div. 2) {2189} | PROGRAMMING | 2000.0 | Codeforces Round 1075 (Div. 2) Editorial | |
| 808 | Majority Wins? | dp greedy math strings | Statement | E | Codeforces Round 1075 (Div. 2) {2189} | PROGRAMMING | 2500.0 | Codeforces Round 1075 (Div. 2) Editorial | |
| 15118 | The Curse of the Frog | greedy math | Statement | B | Codeforces Round 1075 (Div. 2) {2189} | PROGRAMMING | 1000.0 | Codeforces Round 1075 (Div. 2) Editorial | |
| 16899 | Sorting Game | games greedy | Statement | A | Codeforces Round 1073 (Div. 1) {2190} | PROGRAMMING | 500.0 | Codeforces Round 1073 (Div. 1, Div. 2) Editorial | |
| 93 | Maximize Determinant | graphs | Statement | G | Codeforces Round 1073 (Div. 1) {2190} | PROGRAMMING | 3750.0 | Codeforces Round 1073 (Div. 1, Div. 2) Editorial | |
| 10752 | All-in-one Gun | binary search greedy math | Statement | C | Codeforces Round 1081 (Div. 2) {2192} | PROGRAMMING | 1250.0 | Codeforces Round 1081 (Div. 2) Editorial | |
| 165 | Fish Fight | dp math probabilities | Statement | F | Codeforces Round 1081 (Div. 2) {2192} | PROGRAMMING | 3000.0 | Codeforces Round 1081 (Div. 2) Editorial | |
| 42295 | DBMB and the Array | brute force math | Statement | A | Codeforces Round 1076 (Div. 3) {2193} | PROGRAMMING | Разбор Codeforces Round 1076 (Div. 3) | ||
| 15017 | Product Queries | dp math number theory | Statement | E | Codeforces Round 1076 (Div. 3) {2193} | PROGRAMMING | Разбор Codeforces Round 1076 (Div. 3) | ||
| 10708 | Secret message | bitmasks math | Statement | C | Codeforces Round 1078 (Div. 2) {2194} | PROGRAMMING | 1750.0 | Codeforces Round #1078 Editorial | |
| 18088 | Offshores | greedy implementation math | Statement | B | Codeforces Round 1078 (Div. 2) {2194} | PROGRAMMING | 1000.0 | Codeforces Round #1078 Editorial | |
| 23522 | Lawn Mower | math | Statement | A | Codeforces Round 1078 (Div. 2) {2194} | PROGRAMMING | 500.0 | Codeforces Round #1078 Editorial | |
| 2628 | Parabola Independence | dp graphs math | Statement | F | Codeforces Round 1080 (Div. 3) {2195} | PROGRAMMING | Codeforces Round 1080 (Div. 3) Editorial | ||
| 34813 | Sieve of Erato67henes | math | Statement | A | Codeforces Round 1080 (Div. 3) {2195} | PROGRAMMING | Codeforces Round 1080 (Div. 3) Editorial | ||
| 13425 | Absolute Cinema | math | Statement | D | Codeforces Round 1080 (Div. 3) {2195} | PROGRAMMING | Codeforces Round 1080 (Div. 3) Editorial | ||
| 274 | Fuzzy Concatenation (Easy Version) | binary search bitmasks brute force data structures greedy string suffix structures | Statement | E1 | Codeforces Round 1079 (Div. 1) {2196} | PROGRAMMING | 2000.0 | Tutorial | |
| 192 | Fuzzy Concatenation (Hard version) | binary search data structures dp greedy string suffix structures | Statement | E2 | Codeforces Round 1079 (Div. 1) {2196} | PROGRAMMING | 1000.0 | Tutorial | |
| 8380 | Another Problem about Beautiful Pairs | brute force math two pointers | Statement | B | Codeforces Round 1079 (Div. 1) {2196} | PROGRAMMING | 750.0 | Tutorial | |
| 976 | Double Bracket Sequence | data structures dp greedy sortings | Statement | D | Codeforces Round 1079 (Div. 1) {2196} | PROGRAMMING | 2250.0 | Tutorial | |
| 15496 | Game with a Fraction | games math | Statement | A | Codeforces Round 1079 (Div. 1) {2196} | PROGRAMMING | 500.0 | Tutorial | |
| 22589 | Friendly Numbers | brute force math | Statement | A | Codeforces Round 1079 (Div. 2) {2197} | PROGRAMMING | 500.0 | ||
| 89 | Sum of MEX | *special combinatorics data structures dp math | Statement | H | Kotlin Heroes: Episode 14 {2199} | PROGRAMMING | 151783 | ||
| 140 | Self-Produced Sequences | *special combinatorics math | Statement | F | Kotlin Heroes: Episode 14 {2199} | PROGRAMMING | 151783 | ||
| 830 | Two Towers | *special greedy math | Statement | B | Kotlin Heroes: Episode 14 {2199} | PROGRAMMING | 151783 | ||
| 271 | Two Arrays | *special math | Statement | D | Kotlin Heroes: Episode 14 {2199} | PROGRAMMING | 151783 | ||
| 57 | Jammer | *special math | Statement | G | Kotlin Heroes: Episode 14 {2199} | PROGRAMMING | 151783 | ||
| 970 | Operation Permutation | combinatorics dp math probabilities | Statement | G | Codeforces Round 1084 (Div. 3) {2200} | PROGRAMMING | Codeforces Round 1084 (Div. 3) Editorial | ||
| 429 | Six Seven | divide and conquer math number theory strings trees | Statement | H | Codeforces Round 1084 (Div. 3) {2200} | PROGRAMMING | Codeforces Round 1084 (Div. 3) Editorial | ||
| 7686 | Divisive Battle | games greedy math number theory | Statement | E | Codeforces Round 1084 (Div. 3) {2200} | PROGRAMMING | Codeforces Round 1084 (Div. 3) Editorial | ||
| 11267 | Portal | greedy sortings | Statement | D | Codeforces Round 1084 (Div. 3) {2200} | PROGRAMMING | Codeforces Round 1084 (Div. 3) Editorial | ||
| 1927 | Rigged Bracket Sequence | combinatorics dp | Statement | C | Codeforces Round 1082 (Div. 1) {2201} | PROGRAMMING | 1750.0 | Codeforces Round 1082 (Div. 1, Div. 2) Complete Editorial | |
| 60 | Codeforces Heuristic Contest 1001 | constructive algorithms | Statement | G | Codeforces Round 1082 (Div. 1) {2201} | PROGRAMMING | 5000.0 | Codeforces Round 1082 (Div. 1, Div. 2) Complete Editorial | |
| 269 | ABBA Counting | fft math number theory strings | Statement | E | Codeforces Round 1082 (Div. 1) {2201} | PROGRAMMING | 3000.0 | Codeforces Round 1082 (Div. 1, Div. 2) Complete Editorial | |
| 16076 | Parkour Design | math | Statement | A | Codeforces Round 1082 (Div. 2) {2202} | PROGRAMMING | 750.0 | Codeforces Round 1082 (Div. 1, Div. 2) Complete Editorial | |
| 6736 | Test Generator | binary search bitmasks greedy math | Statement | C | Educational Codeforces Round 187 (Rated for Div. 2) {2203} | PROGRAMMING | Educational Codeforces Round 187 Editorial | ||
| 1364 | Probabilistic Card Game | binary search data structures math ternary search | Statement | E | Educational Codeforces Round 187 (Rated for Div. 2) {2203} | PROGRAMMING | Educational Codeforces Round 187 Editorial | ||
| 398 | Binary Search with One Swap | binary search divide and conquer dp hashing math | Statement | F | Educational Codeforces Round 187 (Rated for Div. 2) {2203} | PROGRAMMING | Educational Codeforces Round 187 Editorial | ||
| 13721 | Beautiful Numbers | dp greedy math | Statement | B | Educational Codeforces Round 187 (Rated for Div. 2) {2203} | PROGRAMMING | Educational Codeforces Round 187 Editorial | ||
| 17412 | Towers of Boxes | math | Statement | A | Educational Codeforces Round 187 (Rated for Div. 2) {2203} | PROGRAMMING | Educational Codeforces Round 187 Editorial | ||
| 1172 | Sum of Fractions | binary search combinatorics greedy math two pointers | Statement | F | Educational Codeforces Round 188 (Rated for Div. 2) {2204} | PROGRAMMING | Educational Codeforces Round 188 Editorial | ||
| 4603 | Sum of Digits (and Again) | brute force constructive algorithms math | Statement | E | Educational Codeforces Round 188 (Rated for Div. 2) {2204} | PROGRAMMING | Educational Codeforces Round 188 Editorial | ||
| 16681 | Spring | math | Statement | C | Educational Codeforces Round 188 (Rated for Div. 2) {2204} | PROGRAMMING | Educational Codeforces Round 188 Editorial | ||
| 15664 | Simons and Cakes for Success | implementation math | Statement | B | Codeforces Round 1083 (Div. 2) {2205} | PROGRAMMING | 750.0 | Tutorial | |
| 576 | Upside Down Dijkstra | dfs and similar | Statement | C | 2026 ICPC Asia Pacific Championship - Online Mirror (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2206} | PROGRAMMING | Tutorial (PDF) | ||
| 814 | N-MEX (Counting Version) | combinatorics math | Statement | E2 | Codeforces Round 1085 (Div. 1 + Div. 2) {2207} | PROGRAMMING | 1000.0 | Codeforces Round 1085 (Div. 1 + Div. 2) Editorial | |
| 13240 | 1-1 | greedy strings | Statement | A | Codeforces Round 1085 (Div. 1 + Div. 2) {2207} | PROGRAMMING | 750.0 | Codeforces Round 1085 (Div. 1 + Div. 2) Editorial | |
| 19477 | Bingo Candies | constructive algorithms math | Statement | A | Codeforces Round 1086 (Div. 2) {2208} | PROGRAMMING | 500.0 | Tutorial | |
| 10543 | Stamina and Tasks | dp greedy math | Statement | C | Codeforces Round 1086 (Div. 2) {2208} | PROGRAMMING | 1250.0 | Tutorial | |
| 191 | A Simple Problem | binary search greedy math trees | Statement | F | Codeforces Round 1089 (Div. 2) {2210} | PROGRAMMING | 3500.0 | Codeforces Round 1089 (Div. 2) Editorial | |
| 297 | Binary Strings are Simple? | constructive algorithms dsu interactive number theory | Statement | E | Codeforces Round 1089 (Div. 2) {2210} | PROGRAMMING | 2750.0 | Codeforces Round 1089 (Div. 2) Editorial | |
| 2024 | A Simple GCD Problem (Hard Version) | dp greedy number theory | Statement | C2 | Codeforces Round 1089 (Div. 2) {2210} | PROGRAMMING | 1000.0 | Codeforces Round 1089 (Div. 2) Editorial | |
| 12095 | A Simple GCD Problem (Easy Version) | greedy number theory | Statement | C1 | Codeforces Round 1089 (Div. 2) {2210} | PROGRAMMING | 1250.0 | Codeforces Round 1089 (Div. 2) Editorial | |
| 79 | Median Deletion | Statement | H | Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2) {2211} | PROGRAMMING | 4000.0 | Nebius Round 2 and Codeforces Round 1088 Editorial | ||
| 2734 | AND-array | bitmasks combinatorics math | Statement | D | Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2) {2211} | PROGRAMMING | 2000.0 | Nebius Round 2 and Codeforces Round 1088 Editorial | |
| 11142 | Mickey Mouse Constructive | greedy math | Statement | B | Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2) {2211} | PROGRAMMING | 1250.0 | Nebius Round 2 and Codeforces Round 1088 Editorial | |
| 15347 | Antimedian Deletion | implementation math | Statement | A | Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2) {2211} | PROGRAMMING | 500.0 | Nebius Round 2 and Codeforces Round 1088 Editorial | |
| 766 | RReeppeettiittiioonn | binary search brute force implementation math number theory | Statement | B | Codeforces Round 1092 (Unrated, Div. 1, Based on THUPC 2026 — Finals) {2215} | PROGRAMMING | 1250.0 | ||
| 1768 | Interval Mod | constructive algorithms dp greedy math | Statement | A | Codeforces Round 1092 (Unrated, Div. 1, Based on THUPC 2026 — Finals) {2215} | PROGRAMMING | 750.0 | ||
| 589 | Interval Game | bitmasks combinatorics dp games greedy math probabilities | Statement | F | Codeforces Round 1091 (Div. 2) and CodeCraft 26 {2217} | PROGRAMMING | 2750.0 | ||
| 3003 | Flip the Bit (Hard Version) | greedy implementation math | Statement | D | Codeforces Round 1091 (Div. 2) and CodeCraft 26 {2217} | PROGRAMMING | 1500.0 | ||
| 9623 | Grid Covering | math number theory | Statement | C | Codeforces Round 1091 (Div. 2) and CodeCraft 26 {2217} | PROGRAMMING | 1500.0 | ||
| 31369 | The 67th Integer Problem | brute force games implementation math | Statement | A | Codeforces Round 1090 (Div. 4) {2218} | PROGRAMMING | |||
| 24121 | The 67th Permutation Problem | constructive algorithms greedy math | Statement | C | Codeforces Round 1090 (Div. 4) {2218} | PROGRAMMING | |||
| 3110 | The 67th Iteration of "Counting is Fun" | dfs and similar implementation math | Statement | G | Codeforces Round 1090 (Div. 4) {2218} | PROGRAMMING | |||
| 30430 | The 67th 6-7 Integer Problem | greedy math | Statement | B | Codeforces Round 1090 (Div. 4) {2218} | PROGRAMMING | |||
| 16795 | The 67th OEIS Problem | greedy math number theory | Statement | D | Codeforces Round 1090 (Div. 4) {2218} | PROGRAMMING | |||
| 2563 | Unique Values (Hard version) | binary search constructive algorithms divide and conquer interactive math | Statement | B2 | Codeforces Round 1093 (Div. 1) {2219} | PROGRAMMING | 500.0 | ||
| 7481 | Grid L | brute force math number theory | Statement | A | Codeforces Round 1093 (Div. 1) {2219} | PROGRAMMING | 500.0 | ||
| 45 | Weird Chessboard | constructive algorithms math | Statement | E | Codeforces Round 1093 (Div. 1) {2219} | PROGRAMMING | 3000.0 |