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

Solved
Name
Tags
Solutions
Index
Contest
Type
Points
Tutorial
Rating Level
730 Don't fear, DravDe is kind binary search data structures dp hashing Statement D Codeforces Beta Round 28 (Codeforces format) {28} PROGRAMMING Codeforces Beta Round #28 (Разбор задач A и B) 2600
1812 Optical Experiment binary search data structures dp Statement D Manthan 2011 {67} PROGRAMMING 1900
866 Tourist binary search data structures dp Statement F All-Ukrainian School Olympiad in Informatics {76} PROGRAMMING All-Ukrainian School Olympiad in Informatics: editorial (A,B,C,D,E,F) 2400
3244 Buses binary search data structures dp Statement B Codeforces Beta Round 79 (Div. 1 Only) {101} PROGRAMMING Codeforces Beta Round 79, editoral 1900
4853 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
8050 Bubble Sort Graph binary search data structures dp Statement D Codeforces Round 198 (Div. 2) {340} PROGRAMMING Tutorial 1800
326 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
1042 Inna and Sequence binary search data structures dp trees Statement D Codeforces Round 220 (Div. 2) {374} PROGRAMMING Codeforces Round #220 (Div. 2) разбор 2300
248 Inna and Babies binary search data structures dsu geometry implementation Statement E Codeforces Round 220 (Div. 2) {374} PROGRAMMING Codeforces Round #220 (Div. 2) разбор 2600
10855 Bear and Prime Numbers binary search brute force data structures dp implementation math number theory Statement C Codeforces Round 226 (Div. 2) {385} PROGRAMMING Codeforces Round #226 (Div. 2) — Editorial 1800
639 Biathlon Track binary search brute force constructive algorithms data structures dp Statement D Codeforces Round 242 (Div. 2) {424} PROGRAMMING Codeforces Round #242 (Div. 2) Editorial 2200
43190 Number of Ways binary search brute force data structures dp two pointers Statement C Codeforces Round 266 (Div. 2) {466} PROGRAMMING Editorial Codeforces Round #266 (Div. 2) 1700
4456 Pillars binary search data structures dp sortings trees Statement E Codeforces Round 271 (Div. 2) {474} PROGRAMMING Codeforces Round #271 (Div. 2) Editorial 2200
4421 Strip binary search data structures dp two pointers Statement B Codeforces Round 278 (Div. 1) {487} PROGRAMMING Tutorial 2300
9043 A and B and Lecture Rooms binary search data structures dfs and similar dp trees Statement E Codeforces Round 294 (Div. 2) {519} PROGRAMMING 2300
11710 Mike and Feet binary search data structures dp dsu Statement B Codeforces Round 305 (Div. 1) {547} PROGRAMMING Codeforces Round #305 Editorial 2100
10596 Geometric Progression binary search data structures dp Statement C Codeforces Round #Pi (Div. 2) {567} PROGRAMMING Editorial Codeforces Round #Pi 1700
6450 Bear and Blocks binary search data structures dp math Statement B Codeforces Round 318 [RussianCodeCup Thanks-Round] (Div. 1) {573} PROGRAMMING Codeforces Round #318 [RussianCodeCup Thanks-Round] Editorial 1800
1735 Zip-line binary search data structures dp hashing Statement D Codeforces Round 345 (Div. 1) {650} PROGRAMMING Codeforces Round #345: editorial 2600
6920 Alyona and Spreadsheet binary search data structures dp greedy implementation two pointers Statement C Codeforces Round 401 (Div. 2) {777} PROGRAMMING Problem analysis of Codeforces Round #401 (Div. 2) 1600
7000 The Bakery binary search data structures divide and conquer dp two pointers Statement B Codeforces Round 426 (Div. 1) {833} PROGRAMMING Codeforces Round #426 Editorial 2200
1050 Delivery Club binary search data structures dp Statement E Codeforces Round 441 (Div. 1, by Moscow Team Olympiad) {875} PROGRAMMING Codeforces Round #441. Editorial. 2600
2271 Kuro and GCD and XOR and SUM binary search bitmasks brute force data structures dp dsu greedy math number theory strings trees Statement D Codeforces Round 482 (Div. 2) {979} PROGRAMMING 1750.0 Codeforces Round #482 (Div. 2) Editorial 2200
4315 Pencils and Boxes binary search data structures dp greedy two pointers Statement E Educational Codeforces Round 44 (Rated for Div. 2) {985} PROGRAMMING Educational Codeforces Round 44 Editorial 2000
1315 Sonya and Ice Cream binary search data structures dp greedy shortest paths trees Statement E Codeforces Round 495 (Div. 2) {1004} PROGRAMMING 60443 2400
6501 Glider binary search data structures two pointers Statement D Codeforces Round 509 (Div. 2) {1041} PROGRAMMING Codeforces Round #509 (Div. 2) Editorial 1700
1328 Vasya and Big Integers binary search data structures dp hashing strings Statement E Educational Codeforces Round 51 (Rated for Div. 2) {1051} PROGRAMMING Educational Codeforces Round 51 Editorial 2500
1673 Split the Tree binary search data structures dp greedy trees Statement E Codeforces Round 514 (Div. 2) {1059} PROGRAMMING Codeforces Round #514 (Div. 2) Editorial 2400
1088 Cookies binary search data structures dfs and similar dp games trees Statement F Codeforces Round 530 (Div. 2) {1099} PROGRAMMING E 2300
1308 Vasya and Maximum Profit binary search constructive algorithms data structures dp dsu Statement G Educational Codeforces Round 59 (Rated for Div. 2) {1107} PROGRAMMING Educational Codeforces Round 59 Editorial 2400
1034 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
1914 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
814 Alice and the Unfair Game binary search data structures dp dsu Statement E Codeforces Round 593 (Div. 2) {1236} PROGRAMMING 70654 2600
8341 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
11603 New Year and Ascent Sequence binary search combinatorics data structures dp implementation sortings Statement B Hello 2020 {1284} PROGRAMMING Hello 2020 Editorial 1500
1680 Nanosoft binary search data structures dp implementation Statement E Codeforces Round 619 (Div. 2) {1301} PROGRAMMING 2500.0 Codeforces Round #619 (Div. 2) Editorial 2500
11869 Three Blocks Palindrome (easy version) binary search brute force data structures dp two pointers Statement E1 Codeforces Round 634 (Div. 3) {1335} PROGRAMMING 75993 1700
5305 Binary Subsequence Rotation binary search data structures dp greedy implementation Statement E Codeforces Round 651 (Div. 2) {1370} PROGRAMMING 2500.0 Editorial — Codeforces Round #651
1497 Controversial Rounds binary search data structures dp dsu two pointers Statement F Educational Codeforces Round 93 (Rated for Div. 2) {1398} PROGRAMMING Educational Codeforces Round 93 Editorial
39436 Good Subarrays binary search data structures dp math Statement C Educational Codeforces Round 93 (Rated for Div. 2) {1398} PROGRAMMING Educational Codeforces Round 93 Editorial
6007 Discrete Centrifugal Jumps binary search data structures dp greedy Statement D Codeforces Round 669 (Div. 2) {1407} PROGRAMMING 2000.0 Codeforces Round #669 Editorial
4752 Searchlights binary search brute force data structures dp geometry implementation sortings Statement D Grakn Forces 2020 {1408} PROGRAMMING 2000.0 Grakn Forces -- Editorial
2660 Fruit Sequences binary search data structures divide and conquer dp Statement F Codeforces Raif Round 1 (Div. 1 + Div. 2) {1428} PROGRAMMING 1750.0 Codeforces Raif Round 1 Editorial
4192 Xor Tree binary search bitmasks data structures divide and conquer dp trees Statement C Codeforces Round 683 (Div. 1, by Meet IT) {1446} PROGRAMMING 1250.0 E
996 Strange Permutation binary search combinatorics data structures dp two pointers Statement E Codeforces Round 694 (Div. 1) {1470} PROGRAMMING 2000.0 86464
10426 Max Median binary search data structures dp two pointers Statement D Codeforces Round 703 (Div. 2) {1486} PROGRAMMING 1750.0 Codeforces Round #703 (Div. 2) Editorial
3932 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
5382 Cut binary search data structures graphs number theory Statement D Codeforces Round 717 (Div. 2) {1516} PROGRAMMING 2000.0 Codeforces round #717 editorial
3102 Partition Game binary search data structures divide and conquer dp Statement E Codeforces Round 721 (Div. 2) {1527} PROGRAMMING 3000.0 Tutorial 2500
1116 Game with Cards binary search constructive algorithms data structures dp implementation Statement E Codeforces Round 727 (Div. 2) {1539} PROGRAMMING 2000.0 tutorial 2500
1971 Stringforces binary search bitmasks data structures dp greedy strings two pointers Statement E Educational Codeforces Round 111 (Rated for Div. 2) {1550} PROGRAMMING Educational Codeforces Round 111 Editorial
3410 Telepanting binary search data structures dp sortings Statement F Codeforces Global Round 15 {1552} PROGRAMMING 1500.0 Editorial of Global Round 15
2293 Two Hundred Twenty One (hard version) binary search constructive algorithms data structures dp math Statement D2 Codeforces Round 741 (Div. 2) {1562} PROGRAMMING 1250.0 Editorial of Codeforces Round 741 (Div. 2)
10731 Book binary search data structures dp graphs implementation Statement A Codeforces Round 743 (Div. 1) {1572} PROGRAMMING 500.0 Tutorial 1800
4318 Pchelyonok and Segments binary search data structures dp greedy math Statement E Codeforces Round 750 (Div. 2) {1582} PROGRAMMING 2500.0 Codeforces Round #750 (Div.2) Editorial
1691 RBS binary search bitmasks data structures dp Statement F Educational Codeforces Round 115 (Rated for Div. 2) {1598} PROGRAMMING 95890
821 Tree Queries binary search data structures dp dsu geometry trees Statement F Educational Codeforces Round 116 (Rated for Div. 2) {1606} PROGRAMMING 96454
5468 New Year Concert binary search data structures dp greedy math number theory two pointers Statement D Codeforces Round 769 (Div. 2) {1632} PROGRAMMING 2000.0 Editorial of Codeforces Round #769
1867 MinimizOR binary search bitmasks data structures dp greedy implementation Statement E Codeforces Round 781 (Div. 2) {1665} PROGRAMMING 2250.0 Codeforces Round #781 (Div. 2) Editorial
32616 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
8697 Valiant's New Map binary search brute force data structures dp two pointers Statement D Codeforces Round 841 (Div. 2) and Divide by Zero 2022 {1731} PROGRAMMING 1500.0 Codeforces Round #841 (Div. 2) and Divide By Zero 2022 Editorial
1716 Bracket Cost binary search data structures divide and conquer dp greedy strings Statement E CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} PROGRAMMING 2250.0 CodeTON Round 3 (Div. 1 + Div. 2) Editorial
922 Good Pairs binary search data structures dp Statement F Codeforces Round 838 (Div. 2) {1762} PROGRAMMING 2750.0 Codeforces Round #838 (Div. 2) Editorial
2463 Explosions? binary search data structures dp math Statement E Educational Codeforces Round 143 (Rated for Div. 2) {1795} PROGRAMMING 112963
4204 Music Festival binary search data structures dp greedy sortings Statement C Codeforces Round 857 (Div. 1) {1801} PROGRAMMING 1250.0 Codeforces Round #857 Editorial
2220 Vlad and the Nice Paths (hard version) binary search combinatorics data structures dp math two pointers Statement G2 Codeforces Round 863 (Div. 3) {1811} PROGRAMMING 114788
2406 Range Sorting (Hard Version) binary search data structures dp greedy Statement B2 Codeforces Round 873 (Div. 1) {1827} PROGRAMMING 750.0 Codeforces Round #873 (Div. 1 & 2) Editorial 2400
1791 Palindrome Partition binary search brute force data structures dp hashing strings Statement C Codeforces Round 873 (Div. 1) {1827} PROGRAMMING 1500.0 Codeforces Round #873 (Div. 1 & 2) Editorial 2600
12792 Binary String Copying binary search brute force data structures hashing strings Statement C Educational Codeforces Round 152 (Rated for Div. 2) {1849} PROGRAMMING 118752
19534 To Become Max binary search brute force data structures dp Statement C Codeforces Round 890 (Div. 2) supported by Constructor Institute {1856} PROGRAMMING 1250.0 Codeforces Round #890 (Div. 2) Editorial
3272 Trees and Segments binary search brute force constructive algorithms data structures dp greedy two pointers Statement D Codeforces Round 893 (Div. 2) {1858} PROGRAMMING 2000.0 Codeforces Round #893 (Div. 2) Editorial 2200
8102 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.
13337 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
446 Two Characters, Two Colors binary search data structures dp flows geometry Statement G Educational Codeforces Round 157 (Rated for Div. 2) {1895} PROGRAMMING Educational Codeforces Round 157 Editorial
1001 Babysitting 2-sat binary search data structures graphs Statement F Codeforces Round 912 (Div. 2) {1903} PROGRAMMING 3500.0 Codeforces Round #912 (Div. 2) Editorial
6513 Blocking Elements binary search data structures dp greedy implementation two pointers Statement D Codeforces Round 922 (Div. 2) {1918} PROGRAMMING 2000.0 Codeforces Round #922 (Div. 2) Editorial
6763 Array Repetition binary search data structures dp implementation math Statement D Codeforces Round 919 (Div. 2) {1920} PROGRAMMING 2000.0 Editorial for Codeforces Round #919 (Div. 2)
15291 Vlad and an Odd Ordering binary search bitmasks data structures dp implementation math number theory Statement E Codeforces Round 928 (Div. 4) {1926} PROGRAMMING 126132
36006 Find the Different Ones! binary search brute force data structures dp greedy two pointers Statement D Codeforces Round 923 (Div. 3) {1927} PROGRAMMING 125597
9973 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
5487 Division + LCP (easy version) binary search data structures dp hashing string suffix structures strings Statement G1 Codeforces Round 943 (Div. 3) {1968} PROGRAMMING 129096 1900
2676 Division + LCP (hard version) binary search brute force data structures dp hashing math string suffix structures strings Statement G2 Codeforces Round 943 (Div. 3) {1968} PROGRAMMING 129096 2200
1940 Unique Array binary search data structures divide and conquer dp greedy Statement E Educational Codeforces Round 165 (Rated for Div. 2) {1969} PROGRAMMING Educational Codeforces Round 165 Editorial 2400
22406 Boring Day binary search data structures dp greedy two pointers Statement C Codeforces Round 955 (Div. 2, with prizes from NEAR!) {1982} PROGRAMMING 1000.0 130839
4575 Med-imize binary search data structures dp greedy Statement D Codeforces Round 963 (Div. 2) {1993} PROGRAMMING 2000.0 Editorial of Codeforces Round 963 (Div. 2)
14047 Hungry Games binary search data structures dp two pointers Statement C Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2) {1994} PROGRAMMING 1250.0 Video Tutorial
2350 Eliminating Balls With Merging (Easy Version) binary search brute force data structures divide and conquer dp greedy math Statement E1 Codeforces Round 965 (Div. 2) {1998} PROGRAMMING 1750.0 Video Tutorial
2378 Ksyusha and the Loaded Set binary search data structures dp implementation trees Statement H Codeforces Round 966 (Div. 3) {2000} PROGRAMMING 132689
1294 Alter the GCD binary search data structures divide and conquer dp number theory Statement D Codeforces Round 972 (Div. 2) {2005} PROGRAMMING 2250.0 Discussion stream (With Hints)
248 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)
214 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)
6186 Sums of Segments binary search data structures dp implementation math Statement D Educational Codeforces Round 171 (Rated for Div. 2) {2026} PROGRAMMING Educational Codeforces Round 171 Editorial
1953 The Endspeaker (Hard Version) binary search combinatorics data structures dp greedy implementation two pointers Statement D2 Codeforces Round 982 (Div. 2) {2027} PROGRAMMING 1000.0 Codeforces Round #982 (Div. 2) Editorial
7909 New Rating binary search data structures dp greedy Statement C Refact.ai Match 1 (Codeforces Round 985) {2029} PROGRAMMING 1750.0 Refact.ai Match 1 (Codeforces Round 985) Editorial
1227 Orangutan Approved Subarrays binary search brute force data structures greedy two pointers Statement F Codeforces Round 979 (Div. 2) {2030} PROGRAMMING 2500.0 Codeforces Round 979 Editorial
5955 Yet Another Real Number Problem binary search brute force data structures dp greedy implementation math two pointers Statement D Codeforces Global Round 27 {2035} PROGRAMMING 1500.0 Codeforces Global Round 27 Editorial
11575 Sums on Segments binary search brute force data structures dp greedy math Statement C Educational Codeforces Round 173 (Rated for Div. 2) {2043} PROGRAMMING Educational Codeforces Round 173 Editorial
2319 Kevin and Binary String (Easy Version) binary search brute force data structures dp greedy implementation strings two pointers Statement F1 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) {2061} PROGRAMMING 2000.0 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) Editorial
5200 Game With Triangles binary search data structures dp greedy math ternary search two pointers Statement D Codeforces Round 1000 (Div. 2) {2063} PROGRAMMING 2250.0 Codeforces Round 1000 (Div. 2) — Editorial
14879 Two Colors binary search data structures dp math Statement C Educational Codeforces Round 176 (Rated for Div. 2) {2075} PROGRAMMING Educational Codeforces Round 176 Editorial
8414 Unpleasant Strings binary search data structures dp greedy strings Statement E Educational Codeforces Round 178 (Rated for Div. 2) {2104} PROGRAMMING Educational Codeforces Round 178 Editorial
577 Cycling (Hard Version) binary search data structures dp geometry greedy Statement F2 Codeforces Round 1023 (Div. 2) {2107} PROGRAMMING 2500.0 Codeforces Round 1023 (Div 2) Editorial
2332 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
6906 Submedians (Easy Version) binary search data structures dp greedy Statement E1 Codeforces Round 1039 (Div. 2) {2128} PROGRAMMING 1750.0 Codeforces Round #1039 — Editorial
6892 Inversion Graph Coloring (Easy Version) binary search data structures dp two pointers Statement D1 Codeforces Round 1051 (Div. 2) {2143} PROGRAMMING 1750.0 Codeforces Round 1051 (Div. 2) Editorial
3056 Inversion Graph Coloring (Hard Version) binary search data structures dp two pointers Statement D2 Codeforces Round 1051 (Div. 2) {2143} PROGRAMMING 1000.0 Codeforces Round 1051 (Div. 2) Editorial
2282 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
2921 Locked Out binary search data structures dp graphs greedy implementation two pointers Statement D Pinely Round 5 (Div. 1 + Div. 2) {2161} PROGRAMMING 2250.0
7771 Rae Taylor and Trees (hard version) binary search constructive algorithms data structures dp dsu implementation trees Statement F Codeforces Round 1065 (Div. 3) {2171} PROGRAMMING Codeforces Round 1065 (Div. 3) Editorial
1082 Shiori Miyagi and Maximum Array Score binary search data structures dp Statement H Codeforces Round 1065 (Div. 3) {2171} PROGRAMMING Codeforces Round 1065 (Div. 3) Editorial
12531 Rae Taylor and Trees (easy version) binary search data structures dp dsu greedy implementation trees Statement D Codeforces Round 1065 (Div. 3) {2171} PROGRAMMING Codeforces Round 1065 (Div. 3) Editorial
246 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
3907 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
10098 It All Went Sideways binary search data structures dp greedy Statement E Codeforces Round 1096 (Div. 3) {2227} PROGRAMMING Codeforces Round 1096 (Div. 3) — Editorial