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2233 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
3286 Rotate Columns (easy version) bitmasks brute force dp greedy sortings Statement E1 Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} PROGRAMMING 69791 2000
8711 Dr. Evil Underscores bitmasks brute force dfs and similar divide and conquer dp greedy strings trees Statement D Codeforces Round 613 (Div. 2) {1285} PROGRAMMING Codeforces Round #613 (Div. 2) Editorial 1800
26455 AGAGA XOOORRR bitmasks brute force dp greedy Statement B Codeforces Round 717 (Div. 2) {1516} PROGRAMMING 1000.0 Codeforces round #717 editorial
5063 Nearest Beautiful Number (hard version) bitmasks brute force constructive algorithms dfs and similar dp greedy Statement F2 Codeforces Round 739 (Div. 3) {1560} PROGRAMMING 94009 2100
7318 BA-String bitmasks brute force dp greedy implementation math shortest paths Statement C Educational Codeforces Round 119 (Rated for Div. 2) {1620} PROGRAMMING 98061
12948 Good Key, Bad Key bitmasks brute force dp greedy math Statement G Codeforces Round 806 (Div. 4) {1703} PROGRAMMING 104786
14949 Vampiric Powers, anyone? bitmasks brute force data structures dp greedy Statement C Codeforces Round 882 (Div. 2) {1847} PROGRAMMING 1500.0 Tutorial
2142 Sasha and the Happy Tree Cutting bitmasks brute force dp fft graphs greedy trees Statement E Codeforces Round 926 (Div. 2) {1929} PROGRAMMING 2500.0 Codeforces Round #926 (Div. 2) Editorial.
4854 Nene and the Mex Operator bitmasks brute force constructive algorithms divide and conquer dp greedy implementation Statement D Codeforces Round 939 (Div. 2) {1956} PROGRAMMING 1750.0 [Editorial] Codeforces Round 939 (Div. 2)
23567 Substring and Subsequence bitmasks brute force dp graphs greedy hashing strings trees Statement B Educational Codeforces Round 167 (Rated for Div. 2) {1989} PROGRAMMING Educational Codeforces Round 167 Editorial
3015 Cases bitmasks brute force combinatorics dfs and similar dp graphs greedy strings Statement D Codeforces Round 961 (Div. 2) {1995} PROGRAMMING 2250.0 Video Tutorial
4062 Kevin and And bitmasks brute force dp greedy Statement E 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
5968 Equalization bitmasks brute force dp greedy math Statement D Educational Codeforces Round 176 (Rated for Div. 2) {2075} PROGRAMMING Educational Codeforces Round 176 Editorial
3794 Taiga's Carry Chains bitmasks brute force dp greedy Statement D Codeforces Round 1068 (Div. 2) {2173} PROGRAMMING 1750.0
162 EXPloration, EXPloitation, and Gain Some EXPerience! bitmasks brute force dp greedy implementation Statement D Codeforces Round 1092 (Unrated, Div. 1, Based on THUPC 2026 — Finals) {2215} PROGRAMMING 2750.0 152930
1202 Product of Closures bitmasks brute force constructive algorithms dp greedy implementation math Statement E Educational Codeforces Round 192 (Rated for Div. 2) {2242} PROGRAMMING