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678 Clockwork Bomb data structures dfs and similar dsu greedy trees Statement E Codeforces Round 345 (Div. 1) {650} PROGRAMMING Codeforces Round #345: editorial 3100
2171 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
1466 Leaf Sets data structures dfs and similar dsu graphs greedy sortings trees Statement F Codeforces Round 510 (Div. 2) {1042} PROGRAMMING Tutorial 2400
9622 Replace the Numbers data structures dsu greedy trees Statement E Educational Codeforces Round 119 (Rated for Div. 2) {1620} PROGRAMMING 98061
1893 DFS Trees data structures dfs and similar dsu graphs greedy trees Statement C Codeforces Round 808 (Div. 1) {1707} PROGRAMMING 1250.0 104930
3928 XOR Tree data structures dfs and similar dsu greedy trees Statement E Educational Codeforces Round 132 (Rated for Div. 2) {1709} PROGRAMMING 105164
1679 LuoTianyi and XOR-Tree data structures dfs and similar dp dsu greedy trees Statement C Codeforces Round 872 (Div. 1) {1824} PROGRAMMING 1750.0 CodeForces Round 872(Div. 1&2) Editorial 2500
5360 Microcycle data structures dfs and similar dsu graphs greedy trees Statement F Codeforces Round 923 (Div. 3) {1927} PROGRAMMING 125597
1918 Digital Village (Easy Version) brute force data structures dp dsu graphs greedy implementation math shortest paths trees Statement E1 Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} PROGRAMMING 1750.0 Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial
9642 Penchick and Desert Rabbit data structures dfs and similar dp dsu greedy two pointers Statement D Codeforces Round 987 (Div. 2) {2031} PROGRAMMING 2000.0 Codeforces Round 987 (Div. 2) Editorial
2343 Triangle Tree data structures dfs and similar dp dsu greedy trees Statement E Codeforces Round 1000 (Div. 2) {2063} PROGRAMMING 2750.0 Codeforces Round 1000 (Div. 2) — Editorial
2721 Ancient Tree constructive algorithms data structures dfs and similar dsu greedy trees Statement E Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} PROGRAMMING 2500.0 Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial
11420 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
1745 Tree Orientation (Hard Version) data structures dfs and similar dsu graphs greedy matrices sortings trees Statement D2 Codeforces Round 1086 (Div. 2) {2208} PROGRAMMING 1250.0 Tutorial