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
Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 2891 | Domino Principle | binary search data structures sortings | Statement | E | Codeforces Beta Round 52 (Div. 2) {56} | PROGRAMMING | CodeForces Beta Round #52 :: Разбор задач | 2100 | |
| 651 | Lucky Tickets | binary search data structures sortings two pointers | Statement | C | Codeforces Beta Round 64 {70} | PROGRAMMING | Analysis Codeforces Beta Round #64 | 2200 | |
| 978 | Mushroom Gnomes - 2 | binary search data structures probabilities sortings | Statement | C | Codeforces Beta Round 99 (Div. 1) {138} | PROGRAMMING | Codeforces Beta Round #99: editorial | 2500 | |
| 705 | Buses and People | binary search data structures sortings | Statement | E | Codeforces Round 111 (Div. 2) {160} | PROGRAMMING | Codeforces Round #111 (Div. 2) Разбор Задач | 2400 | |
| 584 | Gripping Story | binary search data structures sortings | Statement | E | Codeforces Round 125 (Div. 1) {198} | PROGRAMMING | Solutions for Codeforces Round #125 | 2400 | |
| 4707 | Blood Cousins Return | binary search data structures dfs and similar dp sortings | Statement | E | Codeforces Round 151 (Div. 2) {246} | PROGRAMMING | Codeforces Round #151 (Div. 2) Tutorial | 2300 | |
| 609 | Printer | binary search data structures implementation sortings | Statement | E | Codeforces Round 154 (Div. 2) {253} | PROGRAMMING | Codeforces Round #154 (Div. 2) — tutorial | 2300 | |
| 602 | Sereja and Straight Lines | binary search data structures geometry sortings two pointers | Statement | D | Codeforces Round 187 (Div. 1) {314} | PROGRAMMING | Codeforces Round #187 tutorial | 2400 | |
| 312 | Looking for Owls | binary search data structures geometry hashing sortings | Statement | D | Codeforces Round 203 (Div. 2) {350} | PROGRAMMING | Editorial Codeforces Round #203 (Div. 2) | 2600 | |
| 2552 | Preparing for the Contest | binary search data structures greedy sortings | Statement | B | Codeforces Round 222 (Div. 1) {377} | PROGRAMMING | Codeforces Round #222 — Problem Analysis | 2100 | |
| 699 | Bug in Code | binary search data structures sortings | Statement | D | Coder-Strike 2014 - Finals (online edition, Div. 2) {421} | PROGRAMMING | Editorial Coder-Strike 2014 Finals | 2100 | |
| 4366 | Pillars | binary search data structures dp sortings trees | Statement | E | Codeforces Round 271 (Div. 2) {474} | PROGRAMMING | Codeforces Round #271 (Div. 2) Editorial | 2200 | |
| 7553 | Vasya and Basketball | binary search brute force data structures implementation sortings two pointers | Statement | C | Codeforces Round 281 (Div. 2) {493} | PROGRAMMING | Codeforces Round #281 (Div. 2) Editorial | 1700 | |
| 2578 | Infinite Inversions | binary search data structures implementation sortings trees | Statement | E | Codeforces Round 301 (Div. 2) {540} | PROGRAMMING | Tutorial | 2400 | |
| 5304 | One-Dimensional Battle Ships | binary search data structures greedy sortings | Statement | D | Codeforces Round #Pi (Div. 2) {567} | PROGRAMMING | Editorial Codeforces Round #Pi | 1800 | |
| 40495 | Queries about less or equal elements | binary search data structures sortings two pointers | Statement | B | Educational Codeforces Round 2 {600} | PROGRAMMING | Editorial | 1300 | |
| 24229 | Chat Order | *special binary search constructive algorithms data structures sortings | Statement | B | VK Cup 2016 - Qualification Round 1 {637} | PROGRAMMING | 1500 | ||
| 1020 | Hostname Aliases | *special binary search data structures implementation sortings strings | Statement | C | CROC 2016 - Qualification {644} | PROGRAMMING | 2300 | ||
| 175 | Автобус | binary search data structures greedy sortings | Statement | E | Технокубок 2016 - Отборочный Раунд 2 {649} | PROGRAMMING | 2500.0 | 2100 | |
| 2723 | Fedor and coupons | binary search data structures greedy sortings | Statement | D | Codeforces Round 390 (Div. 2) {754} | PROGRAMMING | 2000 | ||
| 13015 | PolandBall and Game | binary search data structures games greedy sortings strings | Statement | B | 8VC Venture Cup 2017 - Elimination Round {755} | PROGRAMMING | 8VC Venture Cup 2017 — Elimination Round [Editorial] | 1200 | |
| 2432 | Cartons of milk | binary search data structures greedy sortings two pointers | Statement | D | Codeforces Round 398 (Div. 2) {767} | PROGRAMMING | Codeforces Round #398 (Div. 2) Editorial | 2000 | |
| 2296 | Mahmoud and Ehab and the function | binary search data structures sortings | Statement | E | Codeforces Round 435 (Div. 2) {862} | PROGRAMMING | Codeforces round #435 editorial | 2200 | |
| 5156 | Too Easy Problems | binary search brute force data structures greedy sortings | Statement | D | Hello 2018 {913} | PROGRAMMING | Tutorial | 1800 | |
| 1108 | New Year and the Acquaintance Estimation | binary search data structures graphs greedy implementation math sortings | Statement | E | Good Bye 2018 {1091} | PROGRAMMING | Editorial | 2400 | |
| 1021 | Morse Code | binary search data structures dp hashing sortings string suffix structures strings | Statement | C | Codeforces Round 542 [Alex Lopashev Thanks-Round] (Div. 1) {1129} | PROGRAMMING | 65520 | 2300 | |
| 2874 | 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 | |
| 1886 | Culture Code | binary search combinatorics data structures dp shortest paths sortings | Statement | E | Educational Codeforces Round 69 (Rated for Div. 2) {1197} | PROGRAMMING | E | 2300 | |
| 10066 | Welfare State | binary search brute force data structures sortings | Statement | B | Codeforces Round 576 (Div. 1) {1198} | PROGRAMMING | E | 1600 | |
| 1287 | Choose a Square | binary search data structures sortings | Statement | F | Educational Codeforces Round 73 (Rated for Div. 2) {1221} | PROGRAMMING | Разбор Educational Codeforces Round 73 | 2500 | |
| 8216 | Yet Another Monster Killing Problem | binary search data structures dp greedy sortings two pointers | Statement | D | Educational Codeforces Round 76 (Rated for Div. 2) {1257} | PROGRAMMING | Educational Codeforces Round 76 Editorial | 1700 | |
| 11571 | New Year and Ascent Sequence | binary search combinatorics data structures dp implementation sortings | Statement | B | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 1500 | |
| 3438 | New Year and Conference | binary search data structures hashing sortings | Statement | D | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 2100 | |
| 7393 | Cow and Fields | binary search data structures dfs and similar graphs greedy shortest paths sortings | Statement | D | Codeforces Round 621 (Div. 1 + Div. 2) {1307} | PROGRAMMING | 2000.0 | Codeforces Round #621 (Div. 1 + Div. 2) Editorial | 1900 |
| 4702 | Present | binary search bitmasks constructive algorithms data structures math sortings | Statement | B | Codeforces Round 626 (Div. 1, based on Moscow Open Olympiad in Informatics) {1322} | PROGRAMMING | 1000.0 | Codeforces Round #626 Editorial | |
| 34848 | Pair of Topics | binary search data structures sortings two pointers | Statement | D | Codeforces Round 627 (Div. 3) {1324} | PROGRAMMING | Codeforces Round #627 (Div. 3) Editorial | ||
| 6387 | Multiple Testcases | binary search constructive algorithms data structures greedy sortings two pointers | Statement | D | Educational Codeforces Round 86 (Rated for Div. 2) {1342} | PROGRAMMING | 76633 | 1900 | |
| 1115 | Reading Books (hard version) | binary search data structures greedy sortings ternary search two pointers | Statement | E2 | Codeforces Round 653 (Div. 3) {1374} | PROGRAMMING | 79517 | ||
| 6154 | Choosing flowers | binary search data structures greedy math sortings two pointers | Statement | C | Codeforces Round 657 (Div. 2) {1379} | PROGRAMMING | 1250.0 | Codeforces Round #657 Editorial | 2000 |
| 11089 | Pinkie Pie Eats Patty-cakes | binary search constructive algorithms data structures greedy math sortings | Statement | C | Codeforces Round 662 (Div. 2) {1393} | PROGRAMMING | 1500.0 | Codeforces Round #662 Editorial | |
| 2620 | Two Types of Spells | binary search data structures greedy implementation math sortings | Statement | E | Educational Codeforces Round 93 (Rated for Div. 2) {1398} | PROGRAMMING | Educational Codeforces Round 93 Editorial | ||
| 359 | The Potion of Great Power | *special binary search data structures graphs interactive sortings two pointers | Statement | A | Central-European Olympiad in Informatics, CEOI 2020, Day 2 (IOI, Unofficial Mirror Contest, Unrated) {1403} | PROGRAMMING | CEOI 2020 Online Mirror — Day 2 Tutorial | ||
| 4727 | Searchlights | binary search brute force data structures dp geometry implementation sortings | Statement | D | Grakn Forces 2020 {1408} | PROGRAMMING | 2000.0 | Grakn Forces -- Editorial | |
| 2918 | Complicated Computations | binary search data structures sortings two pointers | Statement | E | Codeforces Round 678 (Div. 2) {1436} | PROGRAMMING | 2500.0 | Codeforces Round #678 (Div. 2). Editorial | |
| 10371 | Divide and Summarize | binary search brute force data structures divide and conquer implementation sortings | Statement | D | Codeforces Round 689 (Div. 2, based on Zed Code Competition) {1461} | PROGRAMMING | 1500.0 | Codeforces Round #689 (Div. 2). Editorial | |
| 8745 | The Treasure of The Segments | binary search data structures greedy sortings | Statement | F | Codeforces Round 690 (Div. 3) {1462} | PROGRAMMING | Codeforces Round #690 (Div. 3) Editorial | ||
| 9050 | Correct Placement | binary search data structures sortings two pointers | Statement | E | Codeforces Round 693 (Div. 3) {1472} | PROGRAMMING | Codeforces Round #693 (Div. 3) Editorial | ||
| 18605 | Equalize the Array | binary search data structures greedy math sortings | Statement | F | Codeforces Round 702 (Div. 3) {1490} | PROGRAMMING | Codeforces Round #702 (Div. 3) Editorial | ||
| 3896 | Travelling Salesman Problem | binary search data structures dp greedy shortest paths sortings | Statement | C | Codeforces Round 712 (Div. 1) {1503} | PROGRAMMING | 1250.0 | T | 2200 |
| 5044 | Cut and Stick | binary search data structures greedy probabilities sortings | Statement | D | Codeforces Round 716 (Div. 2) {1514} | PROGRAMMING | 2000.0 | Codeforces round #716 editorial | |
| 440 | Phoenix and Diamonds | binary search data structures sortings | Statement | I | Codeforces Global Round 14 {1515} | PROGRAMMING | 5000.0 | Editorial | |
| 12854 | PriceFixed | binary search data structures greedy sortings two pointers | Statement | D | Codeforces Round 727 (Div. 2) {1539} | PROGRAMMING | 1500.0 | tutorial | 1600 |
| 3387 | Telepanting | binary search data structures dp sortings | Statement | F | Codeforces Global Round 15 {1552} | PROGRAMMING | 1500.0 | Editorial of Global Round 15 | |
| 4651 | Boring Segments | binary search data structures sortings two pointers | Statement | E | Educational Codeforces Round 112 (Rated for Div. 2) {1555} | PROGRAMMING | 93389 | 2100 | |
| 513 | The Cells on the Paper | binary search data structures implementation sortings | Statement | E | Codeforces Round 758 (Div.1 + Div. 2) {1608} | PROGRAMMING | 2000.0 | Editorial of Codeforces Round #758 (Div.1 + Div. 2) | |
| 1986 | Trader Problem | binary search data structures dsu greedy math sortings | Statement | G | Codeforces Round 760 (Div. 3) {1618} | PROGRAMMING | Codeforces Round #760 (Div. 3) Editorial | ||
| 1945 | New School | binary search data structures greedy implementation sortings | Statement | E | Hello 2022 {1621} | PROGRAMMING | 2250.0 | ||
| 113 | Spaceship Crisis Management | binary search data structures geometry sortings | Statement | F | Codeforces Round 767 (Div. 1) {1628} | PROGRAMMING | 3000.0 | 99276 | |
| 1787 | Spanning Tree Queries | binary search data structures dsu graphs implementation math sortings | Statement | E | Educational Codeforces Round 122 (Rated for Div. 2) {1633} | PROGRAMMING | 99539 | ||
| 2873 | Anonymity Is Important | binary search data structures dsu sortings | Statement | C | Codeforces Round 773 (Div. 1) {1641} | PROGRAMMING | 1250.0 | Codeforces Round #773 editorial | |
| 4492 | Rescheduling the Exam | binary search data structures greedy implementation math sortings | Statement | E | Codeforces Round 776 (Div. 3) {1650} | PROGRAMMING | 100712 | ||
| 4204 | Count the Trains | binary search data structures sortings | Statement | G | Codeforces Round 797 (Div. 3) {1690} | PROGRAMMING | Codeforces Round #797 (Div. 3) Editorial | 2000 | |
| 7688 | Max GEQ Sum | binary search constructive algorithms data structures divide and conquer implementation sortings two pointers | Statement | D | CodeCraft-22 and Codeforces Round 795 (Div. 2) {1691} | PROGRAMMING | 1750.0 | Editorial for CodeCraft-22 and Codeforces Round #795 (Div. 2) | |
| 6317 | Permutation Restoration | binary search data structures greedy math sortings | Statement | D | Educational Codeforces Round 131 (Rated for Div. 2) {1701} | PROGRAMMING | Educational Codeforces Round 131 Editorial | ||
| 31524 | Yet Another Problem About Pairs Satisfying an Inequality | binary search data structures dp greedy sortings | Statement | F | Codeforces Round 806 (Div. 4) {1703} | PROGRAMMING | 104786 | ||
| 2965 | Multi-Colored Segments | binary search data structures math sortings | Statement | F | Codeforces Round 826 (Div. 3) {1741} | PROGRAMMING | 107908 | ||
| 16573 | Incinerate | binary search brute force data structures sortings | Statement | B | Codeforces Round 840 (Div. 2) and Enigma 2022 - Cybros LNMIIT {1763} | PROGRAMMING | 1000.0 | Codeforces Round #840 (Div. 2) and Enigma 2022 — Cybros LNMIIT Editorial | |
| 8313 | Fixed Prefix Permutations | binary search data structures math sortings strings | Statement | D | Educational Codeforces Round 142 (Rated for Div. 2) {1792} | PROGRAMMING | 111835 | ||
| 4153 | Music Festival | binary search data structures dp greedy sortings | Statement | C | Codeforces Round 857 (Div. 1) {1801} | PROGRAMMING | 1250.0 | Codeforces Round #857 Editorial | |
| 500 | Min Cost Permutation (Hard Version) | binary search data structures graphs greedy sortings | Statement | F2 | Codeforces Round 884 (Div. 1 + Div. 2) {1844} | PROGRAMMING | 1000.0 | Codeforces Round #884 (Div. 1 + Div. 2) Editorial | |
| 1102 | The Boss's Identity | binary search bitmasks data structures dfs and similar greedy math sortings | Statement | F | Codeforces Round 882 (Div. 2) {1847} | PROGRAMMING | 3000.0 | Tutorial | |
| 25950 | Vika and the Bridge | binary search data structures greedy implementation math sortings | Statement | B | Codeforces Round 885 (Div. 2) {1848} | PROGRAMMING | 1000.0 | Codeforces Round #885 (Div.2) Editorial | |
| 8064 | Andrey and Escape from Capygrad | binary search data structures dp dsu greedy sortings two pointers | Statement | D | Codeforces Round 892 (Div. 2) {1859} | PROGRAMMING | 1750.0 | Video solutions from Geothermal. | |
| 186 | Freak Joker Process | binary search data structures sortings | Statement | F | COMPFEST 15 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1866} | PROGRAMMING | COMPFEST 15 Preliminary — Editorial | ||
| 13250 | Colorful Table | binary search data structures dp implementation math sortings two pointers | Statement | C | CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!) {1870} | PROGRAMMING | 1500.0 | CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!) Editorial | |
| 5422 | Robot Queries | binary search data structures geometry sortings | Statement | D | Educational Codeforces Round 159 (Rated for Div. 2) {1902} | PROGRAMMING | Educational Codeforces Round 159 Editorial | ||
| 25021 | Array Game | binary search brute force data structures sortings | Statement | C | Codeforces Round 914 (Div. 2) {1904} | PROGRAMMING | 1000.0 | Codeforces Round 914 (Div. 2) Editorial | |
| 5826 | Set To Max (Hard Version) | binary search constructive algorithms data structures dsu greedy implementation sortings two pointers | Statement | D2 | Codeforces Round 914 (Div. 2) {1904} | PROGRAMMING | 750.0 | Codeforces Round 914 (Div. 2) Editorial | |
| 9898 | Messenger in MAC | binary search brute force constructive algorithms data structures dp sortings | Statement | C | Codeforces Round 932 (Div. 2) {1935} | PROGRAMMING | 1500.0 | Codeforces Round #932 (Div. 2) Editorial | |
| 4456 | Cutting Game | binary search brute force data structures implementation sortings two pointers | Statement | F | Codeforces Round 946 (Div. 3) {1974} | PROGRAMMING | Codeforces Round #946 (Div. 3) Editorial | 1900 | |
| 10271 | Bouquet (Hard Version) | binary search data structures greedy math sortings two pointers | Statement | B2 | Codeforces Round 961 (Div. 2) {1995} | PROGRAMMING | 500.0 | Video Tutorial | |
| 246 | Complex Segments (Easy Version) | binary search data structures divide and conquer dsu greedy math sortings | Statement | E1 | Codeforces Round 975 (Div. 1) {2018} | PROGRAMMING | 2250.0 | Editorial of Codeforces Round 975 (Div. 1, Div. 2) | |
| 210 | Complex Segments (Hard Version) | binary search data structures divide and conquer dsu greedy math sortings | Statement | E2 | Codeforces Round 975 (Div. 1) {2018} | PROGRAMMING | 750.0 | Editorial of Codeforces Round 975 (Div. 1, Div. 2) | |
| 3008 | Ardent Flames | binary search data structures sortings two pointers | Statement | F | Codeforces Round 988 (Div. 3) {2037} | PROGRAMMING | Video Tutorial | ||
| 5443 | Recommendations | binary search data structures implementation sortings | Statement | D | Educational Codeforces Round 172 (Rated for Div. 2) {2042} | PROGRAMMING | 136886 | ||
| 11147 | Move Back at a Cost | binary search data structures greedy sortings | Statement | B | Codeforces Round 990 (Div. 1) {2046} | PROGRAMMING | 750.0 | Разбор Codeforces Round 990 (Div. 2 + Div. 1) | |
| 2387 | Adventurers | binary search data structures sortings | Statement | C | Codeforces Round 990 (Div. 1) {2046} | PROGRAMMING | 1500.0 | Разбор Codeforces Round 990 (Div. 2 + Div. 1) | |
| 8494 | Kevin and Competition Memories | binary search data structures greedy sortings two pointers | Statement | D | Codeforces Global Round 28 {2048} | PROGRAMMING | 1250.0 | Tutorial | |
| 7807 | Refined Product Optimality | binary search data structures greedy implementation math schedules sortings | Statement | D | Good Bye 2024: 2025 is NEAR {2053} | PROGRAMMING | 1750.0 | Good Bye 2024: 2025 is NEAR Editorial | |
| 5487 | Changing the String | binary search data structures greedy implementation sortings strings | Statement | E | Educational Codeforces Round 179 (Rated for Div. 2) {2111} | PROGRAMMING | Educational Codeforces Round 179 Editorial | ||
| 2310 | Ice Baby | binary search brute force data structures dp implementation sortings | Statement | H | Codeforces Round 1032 (Div. 3) {2121} | PROGRAMMING | Codeforces Round 1032 (Div. 3) Editorial | ||
| 15296 | MEX Count | binary search data structures greedy sortings two pointers | Statement | E | Codeforces Round 1034 (Div. 3) {2123} | PROGRAMMING | Codeforces Round 1034 (Div. 3) Editorial | ||
| 4165 | Prefix Maximum Invariance | binary search data structures sortings | Statement | F | Codeforces Round 1047 (Div. 3) {2137} | PROGRAMMING | Codeforces Round 1047 (Div. 3) Editorial | ||
| 3239 | 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 | ||
| 4171 | Adjusting Drones | binary search data structures dsu greedy implementation sortings | Statement | E | Codeforces Round 1066 (Div. 1 + Div. 2) {2157} | PROGRAMMING | 2000.0 | Codeforces Round 1066 (Div. 1 + Div. 2) Editorial | |
| 11812 | Dungeon | binary search brute force data structures greedy sortings | Statement | C | Codeforces Global Round 30 (Div. 1 + Div. 2) {2164} | PROGRAMMING | 1500.0 | Codeforces Global Round 30 Editorial | |
| 1440 | Doorway | binary search data structures sortings | Statement | D | 2025-2026 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2181} | PROGRAMMING | Tutorial | ||
| 3590 | Zhily and Barknights | binary search data structures dp math sortings two pointers | Statement | B | Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026) {2223} | PROGRAMMING | 750.0 | Codeforces Round 1097 (Div. 1, Div2, Based on Zhili Cup 2026) Tutorial | |
| 1431 | Minimum Influence | binary search data structures geometry greedy implementation math sortings two pointers | Statement | E | Educational Codeforces Round 190 (Rated for Div. 2) {2230} | PROGRAMMING | Educational Codeforces Round 190 — Editorial |