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Name
Tags
Solutions
Index
Contest
Type
Points
Tutorial
Rating Level
9651 New Year Permutation dfs and similar dsu graphs greedy math sortings Statement B Good Bye 2014 {500} PROGRAMMING Tutorial 2 1600
5997 Sorting by Subsequences dfs and similar dsu implementation math sortings Statement A AIM Tech Round 4 (Div. 1) {843} PROGRAMMING AIM Tech Round 4 -- Editorial 1400
1496 Network Safety dfs and similar dsu graphs math sortings Statement C Codeforces Round 507 (Div. 1, based on Olympiad of Metropolises) {1039} PROGRAMMING 61668 2300
1366 Fancy Fence *special data structures dp dsu math sortings Statement A Central-European Olympiad in Informatics, CEOI 2020, Day 1 (IOI, Unofficial Mirror Contest, Unrated) {1402} PROGRAMMING Editorial
17286 Hemose Shopping dsu math sortings Statement B Codeforces Round 746 (Div. 2) {1592} PROGRAMMING 1000.0 95583
1946 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
1765 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
13304 Heavy Intervals constructive algorithms data structures dsu greedy math sortings Statement C Pinely Round 3 (Div. 1 + Div. 2) {1909} PROGRAMMING 1500.0 Editorial of Pinely Round 3 (Div. 1 + Div. 2)
241 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)
206 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)
1217 MST in Modulo Graph constructive algorithms dsu graphs greedy math number theory sortings Statement D Codeforces Round 1010 (Div. 1, Unrated) {2081} PROGRAMMING 1750.0 Codeforces Round 1010 (Div. 1, Div. 2, based on Zhili Cup 2025) Editorial