CF2056.Codeforces Round 997 (Div. 2) solved(3/7)
CF2056.Codeforces Round 997 (Div. 2) solved(3/7)
CF2014.Codeforces Round 974 (Div. 3) solved(7/8)
这篇是一个简要题解,只有题解,不保证能看懂.
CF1993.Codeforces Round 963 (Div. 2) solved(3/7)
solved（3/6）