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146 Knightmare (easy) graphs interactive shortest paths Statement E1 Codeforces Round 577 (Div. 2) {1201} PROGRAMMING Codeforces Round #577 (Div 2) Editorial 2900
165 Knightmare (hard) graphs interactive shortest paths Statement E2 Codeforces Round 577 (Div. 2) {1201} PROGRAMMING Codeforces Round #577 (Div 2) Editorial 3000
1779 The Hidden Pair (Easy Version) binary search dfs and similar graphs interactive shortest paths trees Statement F1 Codeforces Round 651 (Div. 2) {1370} PROGRAMMING 2000.0 Editorial — Codeforces Round #651
1662 The Hidden Pair (Hard Version) binary search dfs and similar graphs interactive shortest paths trees Statement F2 Codeforces Round 651 (Div. 2) {1370} PROGRAMMING 1250.0 Editorial — Codeforces Round #651
2073 Lost Array constructive algorithms dp graphs interactive shortest paths Statement E Codeforces LATOKEN Round 1 (Div. 1 + Div. 2) {1534} PROGRAMMING 2250.0 Codeforces LATOKEN Round 1 (Div. 1 + Div. 2) Editorial
1373 Connectivity Addicts constructive algorithms dsu graphs greedy interactive shortest paths sortings trees Statement F Codeforces Global Round 22 {1738} PROGRAMMING 2750.0 Editorial of Codeforces Global Round <strong>22</strong>
3593 Sum Graph constructive algorithms graphs implementation interactive math shortest paths trees Statement B Codeforces Round 865 (Div. 1) {1815} PROGRAMMING 1250.0 Editorial of Codeforces Round #865 2000