Codeforces problemset search & solutions
Exclude tags.

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 ... 19 20 21 22 23 ... 44 45 46 >

Solved
Name
Tags
Solutions
Index
Contest
Type
Points
Tutorial
Rating Level
4486 Median String bitmasks math number theory strings Statement E Codeforces Round 550 (Div. 3) {1144} PROGRAMMING 66307 1900
2382 Two Merged Sequences dp greedy Statement G Codeforces Round 550 (Div. 3) {1144} PROGRAMMING 66307 2600
22259 Diverse Strings implementation strings Statement A Codeforces Round 550 (Div. 3) {1144} PROGRAMMING 66307 900
9377 Thanos Sort implementation Statement A April Fools Day Contest 2019 {1145} PROGRAMMING 66327
1200 Pigeon d'Or implementation Statement D April Fools Day Contest 2019 {1145} PROGRAMMING 66327
548 Neat Words Statement F April Fools Day Contest 2019 {1145} PROGRAMMING 66327
838 Mystery Circuit bitmasks brute force Statement C April Fools Day Contest 2019 {1145} PROGRAMMING 66327
1512 Kanban Numbers brute force Statement B April Fools Day Contest 2019 {1145} PROGRAMMING 66327
449 Fourier Doodles Statement E April Fools Day Contest 2019 {1145} PROGRAMMING 66327
197 AI Takeover Statement G April Fools Day Contest 2019 {1145} PROGRAMMING 66327
9448 Hate "A" implementation strings Statement B Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 1100
4325 Tree Diameter bitmasks graphs interactive Statement C Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 1700
1232 Frog Jumping dfs and similar math number theory Statement D Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 2100
1400 Leaf Partition dp trees Statement F Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 2400
1109 Hot is Cold bitmasks data structures divide and conquer implementation Statement E Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 2400
1136 Zoning Restrictions dp flows graphs Statement G Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 2600
808 Satanic Panic dp geometry Statement H Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 2800
23862 Love "A" implementation strings Statement A Forethought Future Cup - Elimination Round {1146} PROGRAMMING 66639 600
5643 Hide and Seek graphs Statement A Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 1500
3129 Chladni Figure brute force strings Statement B Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 1900
3741 Thanos Nim games Statement C Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 2100
883 Palindrome XOR dfs and similar graphs Statement D Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 2600
520 Rainbow Coins interactive Statement E Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 2900
406 Zigzag Game games interactive Statement F Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 3400
5701 Crazy Diamond constructive algorithms sortings Statement C Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 1700
8044 Born This Way binary search brute force two pointers Statement B Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 1700
5305 Dirty Deeds Done Dirt Cheap greedy sortings Statement D Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 1800
1863 Earth Wind and Fire constructive algorithms greedy math sortings two pointers Statement E Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 2300
1192 Foo Fighters bitmasks constructive algorithms Statement F Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 2500
664 Gold Experience constructive algorithms graphs math number theory probabilities Statement G Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 3100
412 Holy Diver data structures Statement H Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 3600
15630 Another One Bites The Dust greedy Statement A Codeforces Global Round 3 {1148} PROGRAMMING Codeforces Global Round 3 Editorial 700
18257 Prefix Sum Primes constructive algorithms greedy math number theory Statement A Codeforces Round 556 (Div. 1) {1149} PROGRAMMING 66783 1300
2086 Three Religions dp implementation strings Statement B Codeforces Round 556 (Div. 1) {1149} PROGRAMMING 66783 2200
1757 Tree Generator™ data structures implementation trees Statement C Codeforces Round 556 (Div. 1) {1149} PROGRAMMING 66783 2900
1145 Abandoning Roads brute force dp graphs greedy Statement D Codeforces Round 556 (Div. 1) {1149} PROGRAMMING 66783 2900
896 Election Promises games graphs Statement E Codeforces Round 556 (Div. 1) {1149} PROGRAMMING 66783 3100
11930 Tiling Challenge greedy implementation Statement B Codeforces Round 556 (Div. 2) {1150} PROGRAMMING 66783 1100
12647 Stock Arbitraging greedy implementation Statement A Codeforces Round 556 (Div. 2) {1150} PROGRAMMING 66783 900
12017 Maxim and Biology brute force strings Statement A Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 1000
9244 Stas and the Queue at the Buffet greedy math sortings Statement D Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 1500
13196 Dima and a Bad XOR bitmasks brute force constructive algorithms dp Statement B Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 1600
5643 Problem for Nazar constructive algorithms math Statement C Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 1700
3876 Number of Components combinatorics data structures dp math Statement E Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 2100
1532 Sonya and Informatics combinatorics dp matrices probabilities Statement F Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 2500
9479 Neko Performs Cat Furrier Transform bitmasks constructive algorithms dfs and similar math Statement B Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 1300
7166 Neko does Maths brute force math number theory Statement C Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 1800
2611 Neko and Aki's Prank dp greedy trees Statement D Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 2000
1172 Neko and Flashback constructive algorithms dfs and similar graphs Statement E Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 2500
895 Neko Rules the Catniverse (Small Version) bitmasks dp matrices Statement F1 Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 2900
1152 Neko Rules the Catniverse (Large Version) bitmasks dp matrices Statement F2 Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 2900
16321 Neko Finds Grapes greedy implementation math Statement A Codeforces Round 554 (Div. 2) {1152} PROGRAMMING T 800
12228 Serval and Bus brute force math Statement A Codeforces Round 551 (Div. 2) {1153} PROGRAMMING Editorial 1100
9439 Serval and Toy Bricks constructive algorithms greedy Statement B Codeforces Round 551 (Div. 2) {1153} PROGRAMMING Editorial 1200
7828 Serval and Parenthesis Sequence greedy strings Statement C Codeforces Round 551 (Div. 2) {1153} PROGRAMMING Editorial 1600
5694 Serval and Rooted Tree binary search dfs and similar dp greedy trees Statement D Codeforces Round 551 (Div. 2) {1153} PROGRAMMING Editorial 1800
1805 Serval and Snake binary search brute force interactive Statement E Codeforces Round 551 (Div. 2) {1153} PROGRAMMING Editorial 2100
1018 Serval and Bonus Problem combinatorics dp math probabilities Statement F Codeforces Round 551 (Div. 2) {1153} PROGRAMMING Editorial 2800
17853 Make Them Equal math Statement B Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 1200
10658 Walking Robot greedy Statement D Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 1400
11643 Gourmet Cat implementation math Statement C Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 1400
7094 Two Teams data structures implementation sortings Statement E Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 1800
3435 Shovels Shop dp greedy sortings Statement F Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 2300
3415 Minimum Possible LCM brute force greedy math number theory Statement G Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 2400
90268 Restoring Three Numbers math Statement A Codeforces Round 552 (Div. 3) {1154} PROGRAMMING Codeforces Round #552 (Div. 3) Editorial 600
28509 Reverse a Substring implementation sortings strings Statement A Educational Codeforces Round 63 (Rated for Div. 2) {1155} PROGRAMMING 66687 1000
12801 Game with Telephone Numbers games greedy implementation Statement B Educational Codeforces Round 63 (Rated for Div. 2) {1155} PROGRAMMING 66687 1200
9847 Alarm Clocks Everywhere math number theory Statement C Educational Codeforces Round 63 (Rated for Div. 2) {1155} PROGRAMMING 66687 1300
7975 Beautiful Array brute force data structures divide and conquer dp greedy Statement D Educational Codeforces Round 63 (Rated for Div. 2) {1155} PROGRAMMING 66687 1900
1710 Guess the Root brute force interactive math Statement E Educational Codeforces Round 63 (Rated for Div. 2) {1155} PROGRAMMING 66687 2200
577 Delivery Oligopoly brute force dp graphs Statement F Educational Codeforces Round 63 (Rated for Div. 2) {1155} PROGRAMMING 66687 2700
8938 Inscribed Figures geometry Statement A Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 1400
6612 Ugly Pairs dfs and similar greedy implementation sortings strings Statement B Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 1800
6888 Match Points binary search greedy sortings ternary search two pointers Statement C Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 2000
4927 0-1-Tree dfs and similar divide and conquer dp dsu trees Statement D Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 2300
4273 Special Segments of Permutation data structures divide and conquer dsu two pointers Statement E Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 2400
1778 Card Bag dp math probabilities Statement F Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 2500
191 Optimizer graphs greedy hashing implementation Statement G Educational Codeforces Round 64 (Rated for Div. 2) {1156} PROGRAMMING 66827 3100
16700 Reachable Numbers implementation Statement A Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 1100
15993 Long Number greedy Statement B Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 1300
13695 Increasing Subsequence (easy version) greedy Statement C1 Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 1300
9380 Minimum Array binary search data structures greedy Statement E Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 1700
9297 Increasing Subsequence (hard version) greedy Statement C2 Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 1700
4037 N Problems During K Days constructive algorithms greedy math Statement D Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 2100
2949 Maximum Balanced Circle constructive algorithms dp greedy two pointers Statement F Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 2300
1132 Inverse of Rows and Columns brute force constructive algorithms Statement G Codeforces Round 555 (Div. 3) {1157} PROGRAMMING 66737 2800
8589 The Party and Sweets binary search constructive algorithms greedy implementation math sortings two pointers Statement A Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 1500
2408 The minimal unique substring constructive algorithms math strings Statement B Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 2200
2326 Permutation recovery constructive algorithms data structures dfs and similar graphs greedy math sortings Statement C Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 2300
1040 Winding polygonal line constructive algorithms geometry greedy math Statement D Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 2800
232 Strange device binary search interactive math trees Statement E Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 3300
653 Density of subarrays dp math Statement F Codeforces Round 559 (Div. 1) {1158} PROGRAMMING 66993 3400
7888 Expansion coefficient of the array implementation math Statement B Codeforces Round 559 (Div. 2) {1159} PROGRAMMING 66993 1300
13483 A pile of stones implementation math Statement A Codeforces Round 559 (Div. 2) {1159} PROGRAMMING 66993 800
0 Collaboration *special Statement A2 VRt Contest 2019 (marathon) {1160} PROGRAMMING
6127 Double Matrix brute force greedy Statement B Codeforces Round 557 (Div. 2) [based on Forethought Future Cup - Final Round] {1162} PROGRAMMING Forethought Future Cup Final Round Tutorial 1400
8798 Zoning Restrictions Again implementation Statement A Codeforces Round 557 (Div. 2) [based on Forethought Future Cup - Final Round] {1162} PROGRAMMING Forethought Future Cup Final Round Tutorial 800
14041 Eating Soup greedy math Statement A Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 1000
7389 Cat Party (Easy Edition) data structures implementation Statement B1 Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 1500
7710 Cat Party (Hard Edition) data structures implementation Statement B2 Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 1700
3630 Power Transmission (Easy Edition) brute force geometry Statement C1 Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 1900
4018 Power Transmission (Hard Edition) data structures geometry implementation math Statement C2 Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 2000
1680 Mysterious Code dp strings Statement D Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 2200
1057 Magical Permutation bitmasks brute force constructive algorithms data structures graphs math Statement E Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 2800
1540 Indecisive Taxi Fee data structures graphs shortest paths Statement F Codeforces Round 558 (Div. 2) {1163} PROGRAMMING 66943 2900
24900 Polycarp Training data structures greedy sortings Statement B Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 1000
14806 Remainder implementation math Statement A Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 1200
14584 Good String greedy Statement C Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 1300
20390 Almost All Divisors math number theory Statement D Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 1600
10371 Two Arrays and Sum of Functions greedy math sortings Statement E Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 1800
2531 Microtransactions (hard version) binary search greedy implementation Statement F2 Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 2400
2208 Microtransactions (easy version) binary search greedy Statement F1 Codeforces Round 560 (Div. 3) {1165} PROGRAMMING Codeforces Round #560 (Div. 3) Editorial 2400
11993 All the Vowels Please constructive algorithms math number theory Statement B Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 1100
11279 A Tale of Two Lands binary search sortings two pointers Statement C Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 1600
3046 The LCMs Must be Large bitmasks brute force constructive algorithms math number theory Statement E Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 2000
2316 Cute Sequences binary search brute force greedy math Statement D Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 2100
857 Vicky's Delivery Service data structures dsu graphs hashing Statement F Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 2800
15205 Silent Classroom combinatorics greedy Statement A Codeforces Round 561 (Div. 2) {1166} PROGRAMMING Codeforces Round #561 (Div. 2) Editorial 900
28041 News Distribution dfs and similar dsu graphs Statement C Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 1400
17626 Lost Numbers brute force divide and conquer interactive math Statement B Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 1400
7412 Bicolored RBS constructive algorithms greedy Statement D Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 1500
3001 Range Deleting binary search combinatorics data structures two pointers Statement E Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 2100
1935 Scalar Queries combinatorics data structures math sortings Statement F Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 2300
225 Low Budget Inception brute force geometry Statement G Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 3000
20844 Telephone Number brute force greedy strings Statement A Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 700
7783 Increasing by Modulo binary search greedy Statement A Codeforces Round 562 (Div. 1) {1168} PROGRAMMING Codeforces Round #562 — Editorial 1800
3828 Good Triple brute force two pointers Statement B Codeforces Round 562 (Div. 1) {1168} PROGRAMMING Codeforces Round #562 — Editorial 2000
2783 And Reachability bitmasks dp Statement C Codeforces Round 562 (Div. 1) {1168} PROGRAMMING Codeforces Round #562 — Editorial 2400
577 Anagram Paths dp implementation trees Statement D Codeforces Round 562 (Div. 1) {1168} PROGRAMMING Codeforces Round #562 — Editorial 2900
450 Xor Permutations constructive algorithms math Statement E Codeforces Round 562 (Div. 1) {1168} PROGRAMMING Codeforces Round #562 — Editorial 3100
12791 Circle Metro implementation math Statement A Codeforces Round 562 (Div. 2) {1169} PROGRAMMING Codeforces Round #562 — Editorial 1000
10835 Pairs graphs implementation Statement B Codeforces Round 562 (Div. 2) {1169} PROGRAMMING Codeforces Round #562 — Editorial 1500
136 Wheels *special binary search greedy Statement F Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
1567 Three Integers Again *special math Statement A Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
275 Sliding Doors *special binary search Statement E Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
836 Minus and Minus Give Plus *special implementation strings Statement C Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
57 Longest Saw *special constructive algorithms Statement H Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
85 Graph Decomposition *special graphs Statement G Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
47 Good Subsets *special dp Statement I Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
532 Decoding of Integer Sequences *special data structures implementation Statement D Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
1151 Bad Days *special implementation Statement B Kotlin Heroes: Episode 1 {1170} PROGRAMMING Kotlin Heroes Editorial
5300 Nauuo and Cards greedy implementation Statement A Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 1800
4468 Nauuo and Circle combinatorics dfs and similar dp trees Statement B Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 2000
1264 Nauuo and Pictures (easy version) dp probabilities Statement C1 Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 2500
1065 Nauuo and Pictures (hard version) dp probabilities Statement C2 Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 2700
750 Nauuo and Portals constructive algorithms Statement D Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 2800
380 Nauuo and ODT data structures Statement E Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 3300
919 Nauuo and Bug data structures Statement F Codeforces Round 564 (Div. 1) {1172} PROGRAMMING Codeforces Round #564 Editorial 3300
9485 Nauuo and Chess constructive algorithms greedy Statement B Codeforces Round 564 (Div. 2) {1173} PROGRAMMING Codeforces Round #564 Editorial 1100
17390 Nauuo and Votes greedy Statement A Codeforces Round 564 (Div. 2) {1173} PROGRAMMING Codeforces Round #564 Editorial 700
19458 Ehab Fails to Be Thanos constructive algorithms greedy sortings Statement A Codeforces Round 563 (Div. 2) {1174} PROGRAMMING Codeforces round #563 editorial 1000
17004 Ehab Is an Odd Person sortings Statement B Codeforces Round 563 (Div. 2) {1174} PROGRAMMING Codeforces round #563 editorial 1200
12891 Ehab and a Special Coloring Problem constructive algorithms number theory Statement C Codeforces Round 563 (Div. 2) {1174} PROGRAMMING Codeforces round #563 editorial 1300
5133 Ehab and the Expected XOR Problem bitmasks constructive algorithms Statement D Codeforces Round 563 (Div. 2) {1174} PROGRAMMING Codeforces round #563 editorial 1900
2087 Ehab and the Big Finale constructive algorithms divide and conquer graphs implementation interactive trees Statement F Codeforces Round 563 (Div. 2) {1174} PROGRAMMING Codeforces round #563 editorial 2300
1853 Ehab and the Expected GCD Problem combinatorics dp math number theory Statement E Codeforces Round 563 (Div. 2) {1174} PROGRAMMING Codeforces round #563 editorial 2500
20161 From Hero to Zero implementation math Statement A Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 1000
7314 Electrification binary search brute force greedy Statement C Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 1600
12878 Catch Overflow! data structures expression parsing implementation Statement B Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 1600
7173 Array Splitting greedy sortings Statement D Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 1900
4823 Minimal Segment Cover data structures dfs and similar divide and conquer dp greedy implementation trees Statement E Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 2200
2947 The Number of Subpermutations brute force data structures divide and conquer hashing math Statement F Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 2600
941 Yet Another Partiton Problem data structures divide and conquer dp geometry two pointers Statement G Educational Codeforces Round 66 (Rated for Div. 2) {1175} PROGRAMMING Editorial 2700
18472 Merge it! math Statement B Codeforces Round 565 (Div. 3) {1176} PROGRAMMING 67598 1100
15241 Lose it! dp greedy implementation Statement C Codeforces Round 565 (Div. 3) {1176} PROGRAMMING 67598 1300
14172 Cover it! dfs and similar dsu graphs shortest paths trees Statement E Codeforces Round 565 (Div. 3) {1176} PROGRAMMING 67598 1700
5894 Recover it! dfs and similar graphs greedy number theory sortings Statement D Codeforces Round 565 (Div. 3) {1176} PROGRAMMING 67598 1900
2378 Destroy it! dp implementation sortings Statement F Codeforces Round 565 (Div. 3) {1176} PROGRAMMING 67598 2500
25406 Divide it! brute force greedy implementation Statement A Codeforces Round 565 (Div. 3) {1176} PROGRAMMING 67598 800
6923 Digits Sequence (Easy Edition) implementation Statement A Testing Round 15 (Unrated) {1177} PROGRAMMING 1100
3153 Digits Sequence (Hard Edition) binary search divide and conquer implementation Statement B Testing Round 15 (Unrated) {1177} PROGRAMMING 1800
11334 Prime Minister greedy Statement A Codeforces Global Round 4 {1178} PROGRAMMING E 1100
23386 WOW Factor dp strings Statement B Codeforces Global Round 4 {1178} PROGRAMMING E 1300
13548 Tiles combinatorics greedy math Statement C Codeforces Global Round 4 {1178} PROGRAMMING E 1300
7979 Prime Graph constructive algorithms greedy math number theory Statement D Codeforces Global Round 4 {1178} PROGRAMMING E 1600
4636 Archaeology brute force constructive algorithms greedy strings Statement E Codeforces Global Round 4 {1178} PROGRAMMING E 1900
2355 Short Colorful Strip combinatorics dfs and similar dp Statement F1 Codeforces Global Round 4 {1178} PROGRAMMING E 2200
1094 Long Colorful Strip dp Statement F2 Codeforces Global Round 4 {1178} PROGRAMMING E 2600
677 The Awesomest Vertex data structures dfs and similar Statement G Codeforces Global Round 4 {1178} PROGRAMMING E 2900
299 Stock Exchange binary search flows graphs Statement H Codeforces Global Round 4 {1178} PROGRAMMING E 3500
12096 Valeriy and Deque data structures implementation Statement A Codeforces Round 569 (Div. 1) {1179} PROGRAMMING Editorial of Round #569 1500
4617 Tolik and His Uncle constructive algorithms Statement B Codeforces Round 569 (Div. 1) {1179} PROGRAMMING Editorial of Round #569 1800
2566 Serge and Dining Room binary search data structures graph matchings greedy implementation math trees Statement C Codeforces Round 569 (Div. 1) {1179} PROGRAMMING Editorial of Round #569 2400
1089 Fedor Runs for President data structures dp trees Statement D Codeforces Round 569 (Div. 1) {1179} PROGRAMMING Editorial of Round #569 2600
204 Alesya and Discrete Math divide and conquer interactive Statement E Codeforces Round 569 (Div. 1) {1179} PROGRAMMING Editorial of Round #569 3200
10158 Nick and Array greedy implementation Statement B Codeforces Round 569 (Div. 2) {1180} PROGRAMMING Editorial of Round #569 1500
27790 Alex and a Rhombus dp implementation math Statement A Codeforces Round 569 (Div. 2) {1180} PROGRAMMING Editorial of Round #569 800
15065 Chunga-Changa greedy math Statement A Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 1000
6706 Split a Number greedy implementation strings Statement B Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 1500
3418 Flag brute force combinatorics dp implementation Statement C Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 1900
2920 Irrigation binary search data structures implementation sortings trees two pointers Statement D Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 2100
674 A Story of One Country (Easy) brute force divide and conquer sortings Statement E1 Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 2600
549 A Story of One Country (Hard) brute force greedy sortings Statement E2 Codeforces Round 567 (Div. 2) {1181} PROGRAMMING Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) 3000
36303 Filling Shapes dp math Statement A Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 1000
12103 Plus from Picture dfs and similar implementation strings Statement B Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 1300
4612 Beautiful Lyrics data structures greedy strings Statement C Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 1700
3490 Product Oriented Recurrence dp math matrices number theory Statement E Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 2200
1046 Complete Mirror constructive algorithms dfs and similar dp hashing implementation trees Statement D Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 2500
450 Maximum Sine binary search data structures number theory Statement F Codeforces Round 566 (Div. 2) {1182} PROGRAMMING 67614 2900
19856 Equalize Prices math Statement B Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 1000
15246 Computer Game binary search math Statement C Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 1400
22004 Candy Box (easy version) greedy sortings Statement D Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 1400
5596 Subsequences (easy version) dp graphs implementation shortest paths Statement E Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 2000
2750 Candy Box (hard version) greedy implementation sortings Statement G Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 2100
3750 Subsequences (hard version) dp strings Statement H Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 2200
2303 Topforces Strikes Back brute force math sortings Statement F Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 2400
27262 Nearest Interesting Number implementation Statement A Codeforces Round 570 (Div. 3) {1183} PROGRAMMING Tutorial 900
6668 Heidi Learns Hashing (Easy) brute force math number theory Statement A1 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 1200
6275 The Doctor Meets Vader (Easy) binary search sortings Statement B1 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 1400
2818 Parallel Universes (Easy) implementation Statement D1 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 1600
2968 Heidi and the Turing Test (Easy) implementation Statement C1 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 1700
1885 Daleks' Invasion (easy) graphs trees Statement E1 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2000
1154 Heidi Learns Hashing (Medium) brute force number theory Statement A2 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2100
1126 Daleks' Invasion (medium) dfs and similar graphs shortest paths trees Statement E2 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2200
716 The Doctor Meets Vader (Medium) flows graph matchings graphs shortest paths sortings Statement B2 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2300
807 Heidi and the Turing Test (Medium) data structures Statement C2 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2300
706 Daleks' Invasion (hard) data structures dsu graphs trees Statement E3 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2500
310 The Doctor Meets Vader (Hard) flows shortest paths Statement B3 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 2700
177 Heidi Learns Hashing (Hard) fft math number theory Statement A3 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 3100
50 Heidi and the Turing Test (Hard) Statement C3 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 3200
169 Parallel Universes (Hard) math matrices Statement D2 Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} PROGRAMMING helvetic-coding-contest-2019-editorial.pdf 3300
11954 Exam in BerSU (easy version) greedy sortings Statement C1 Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 1200
14360 Email from Polycarp implementation strings Statement B Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 1200
7086 Extra Element implementation math Statement D Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 1700
7875 Exam in BerSU (hard version) brute force data structures greedy math Statement C2 Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 1700
2835 Polycarp and Snakes brute force implementation Statement E Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 2000
3276 Playlist for Polycarp (easy version) bitmasks combinatorics dp Statement G1 Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 2100
2310 Two Pizzas bitmasks brute force Statement F Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 2200
989 Playlist for Polycarp (hard version) combinatorics dp Statement G2 Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 2800
15485 Ropewalkers math Statement A Codeforces Round 568 (Div. 2) {1185} PROGRAMMING Editorial for Codeforces Round #568 (Div. 2) 900
9400 Vus the Cossack and Numbers constructive algorithms greedy math Statement D Codeforces Round 571 (Div. 2) {1186} PROGRAMMING E 1600
6622 Vus the Cossack and Strings implementation math Statement C Codeforces Round 571 (Div. 2) {1186} PROGRAMMING E 1800
1220 Vus the Cossack and a Graph dfs and similar graphs greedy implementation Statement F Codeforces Round 571 (Div. 2) {1186} PROGRAMMING E 2300
775 Vus the Cossack and a Field divide and conquer implementation math Statement E Codeforces Round 571 (Div. 2) {1186} PROGRAMMING E 2500
43107 Vus the Cossack and a Contest implementation Statement A Codeforces Round 571 (Div. 2) {1186} PROGRAMMING E 600
12991 Letters Shop binary search implementation strings Statement B Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 1300
6831 Vasya And Array constructive algorithms greedy implementation Statement C Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 1800
12121 Tree Painting dfs and similar dp trees Statement E Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 2000
3091 Subarray Sorting data structures sortings Statement D Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 2200
729 Gang Up flows graphs Statement G Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 2600
1200 Expected Square Beauty dp math probabilities Statement F Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 2600
15683 Stickers and Toys math Statement A Educational Codeforces Round 67 (Rated for Div. 2) {1187} PROGRAMMING Разбор Educational Codeforces Round 67 900
9069 Add on a Tree trees Statement A1 Codeforces Round 572 (Div. 1) {1188} PROGRAMMING Editorial of Codeforces Round #572 1600
5424 Count Pairs math matrices number theory two pointers Statement B Codeforces Round 572 (Div. 1) {1188} PROGRAMMING Editorial of Codeforces Round #572 2200
1335 Add on a Tree: Revolution constructive algorithms dfs and similar implementation trees Statement A2 Codeforces Round 572 (Div. 1) {1188} PROGRAMMING Editorial of Codeforces Round #572 2500
2233 Array Beauty dp Statement C Codeforces Round 572 (Div. 1) {1188} PROGRAMMING Editorial of Codeforces Round #572 2700
1114 Make Equal dp Statement D Codeforces Round 572 (Div. 1) {1188} PROGRAMMING Editorial of Codeforces Round #572 3000
319 Problem from Red Panda combinatorics Statement E Codeforces Round 572 (Div. 1) {1188} PROGRAMMING Editorial of Codeforces Round #572 3200
15488 Number Circle greedy math sortings Statement B Codeforces Round 572 (Div. 2) {1189} PROGRAMMING Editorial of Codeforces Round #572 1100
11145 Candies! data structures dp implementation math Statement C Codeforces Round 572 (Div. 2) {1189} PROGRAMMING Editorial of Codeforces Round #572 1400