justdoa:
博客地址:https://www.cnblogs.com/justdoa/
PAT-Battle Over Cities - Hard Version (35 分)-最小生成树 Codeforces-Round#547(Div.3)-C-Polycarp Restores Permutation Codeforces-Round#546(Div.2)-D-Nastya Is Buying Lunch HDU-5441-离线化并查集
PAT-Battle Over Cities - Hard Version (35 分)-最小生成树
Codeforces-Round#547(Div.3)-C-Polycarp Restores Permutation
Codeforces-Round#546(Div.2)-D-Nastya Is Buying Lunch
HDU-5441-离线化并查集