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# [AT_ABC313_C-Approximate Equalization II](https://atcoder.jp/contests/abc313/tasks/abc313_c "ABC313_C") [>> 没想到还有Approximate Equalization I !!:AT_AB 阅读全文
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# [1843D.Apple Tree](https://codeforces.com/contest/1843/problem/D "Codeforces 1843D") ## Description: - 一棵树( $Tree$ 无环无重边 ) $n$ 个节点,根节点为1(节点编号 $1$~$n 阅读全文
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# [1850H.The Third Letter](https://codeforces.com/contest/1850/problem/H "Codeforces 1850H") ## Description: - $n$ 个人,$m$ 个条件,每次给出两个人 $a_i$ 和 $b_i$ 一维 阅读全文
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# [1855B.Longest Divisors Interval](https://codeforces.com/contest/1855/problem/B "Codeforces 1855B") ## Description: - 对于一个整数 $n$ $(1\leq n \leq 10^{ 阅读全文