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10808 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
1276 Traffic Jams in the Land data structures dp number theory Statement D Codeforces Round 284 (Div. 1) {498} PROGRAMMING Codeforces Round #284 Editorial 2400
2267 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
11115 Multiplicity data structures dp implementation math number theory Statement C Codeforces Round 523 (Div. 2) {1061} PROGRAMMING Tutorial (en) 1700
5575 GCD Counting data structures dfs and similar dp number theory trees Statement D Educational Codeforces Round 58 (Rated for Div. 2) {1101} PROGRAMMING 64483 2000
1198 Graph Traveler brute force data structures dfs and similar dp graphs implementation math number theory Statement F Codeforces Round 578 (Div. 2) {1200} PROGRAMMING Codeforces Round #578 (Div. 2) Editorial 2500
9194 Square-free division (easy version) data structures dp greedy math number theory Statement E1 Codeforces Round 708 (Div. 2) {1497} PROGRAMMING 1500.0 Codeforces Round #708 Editorial 1700
1961 Square-free division (hard version) data structures dp greedy hashing math number theory Statement E2 Codeforces Round 708 (Div. 2) {1497} PROGRAMMING 1500.0 Codeforces Round #708 Editorial 2500
6184 Up the Strip (simplified version) brute force data structures dp math number theory Statement D1 Codeforces Round 740 (Div. 2, based on VK Cup 2021 - Final (Engine)) {1561} PROGRAMMING 1500.0 Codeforces Round #740 Editorial 1700
1203 Cats on the Upgrade (easy version) data structures dfs and similar divide and conquer dp graphs trees Statement E1 Codeforces Round 765 (Div. 2) {1625} PROGRAMMING 2000.0 Editorial of Codeforces Round #765 (Div. 2)
5457 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
1257 Gojou and Matrix Game data structures dp games math number theory sortings Statement E Codeforces Round 779 (Div. 2) {1658} PROGRAMMING 2500.0 Codeforces Round #779 (Div. 2) Editorial
642 Electrical Efficiency combinatorics data structures dp number theory trees Statement E COMPFEST 14 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1725} PROGRAMMING Tutorial
321 Arranging Crystal Balls data structures divide and conquer divide and conquer dp geometry graphs number theory Statement I Codeforces Round 831 (Div. 1 + Div. 2) {1740} PROGRAMMING 3500.0 Tutorial 3500
15241 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
1297 Nobody is needed brute force data structures dp math number theory Statement F Codeforces Round 936 (Div. 2) {1946} PROGRAMMING 2750.0 Codeforces Round #936 (Div. 2) Editorial
8199 Nikita and LCM brute force data structures dp greedy math number theory sortings Statement C Codeforces Round 948 (Div. 2) {1977} PROGRAMMING 1750.0 129858 1900
1289 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)