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noi.ac NA536 打地鼠

noi.ac NA535 生成树

noi.ac NA534 猫

Codeforces Round #555 (Div. 3)[1157]题解

Codeforces | CF1033D Divisors

Codeforces | CF1029F Multicolored Markers

Codeforces | CF1028C Rectangles

Codeforces | CF1029D Concatenated Multiples

Atcoder | AT2665 Moderate Differences

[模板]KMP算法