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3426 Mahmoud and a Dictionary data structures dfs and similar dp ds graphs Statement D Codeforces Round 396 (Div. 2) {766} PROGRAMMING 2000
2983 Pathwalks data structures dp graphs Statement F Divide by Zero 2018 and Codeforces Round 474 (Div. 1 + Div. 2, combined) {960} PROGRAMMING Divide by Zero 2018 and Codeforces Round #474 (Div. 1 + Div. 2, combined) Editorial 2000