网络流 1
「codeforces - 1592F2」Alice and Recoloring 2:妙妙题,显然只会操作 $(1, 1)$ 和 $(n, m)$,分别记作操作 1 和操作 2。我们希望单点操...
In mathematics you don't understand things, you just get used to them.
In mathematics you don't understand things, you just get used to them.