#include<bits/stdc++.h> #define reint register int using namespace std; int n,m; inline void read(int &a) { //快读 int x(0),y(1); char c=getchar(); while(c<'0'||c>'9') { if(c=='-')y=-1; c=getchar(); } while(c>='0'&&c<='9') { x=(x<…
#include<bits/stdc++.h> #define reint register int using namespace std; int n,m; inline void read(int &a) { //快读 int x(0),y(1); char c=getchar(); while(c<'0'||c>'9') { if(c=='-')y=-1; c=getchar(); } while(c>='0'&&c<='9') { x=(x<…
