这个 E 我写了个很简短的做法，但是不知道为什么过不去，换了一种写法才过的。 #include<iostream> #include<cstdio> #include<algorithm> #include<vector> #include<cstring> #include<cmath> #include<string> #include<set> #include<map> #include<queue> #include<assert.h> #define ...