rt.

#include<bits/stdc++.h>
using namespace std;
int a[514][514],n,q,i,j;
int main(){
    cin>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)cin>>a[i][j];
    cin>>q;
    while(q--){
        char z;int x,c,v,b,ma=0,mi=INT_MAX;
        cin>>z;
        if(z=='q'){
            cin>>x>>c>>v>>b;
            for(i=x;i<=c;i++)
                for(j=v;j<=b;j++)ma=max(ma,a[i][j]),mi=min(mi,a[i][j]);
            cout<<ma<<' '<<mi;
        }
        else{
            cin>>x>>c>>v;
            a[x][c]=v;
        }
    }
}

提交显示：

$\quad\LARGE{提交失败}$

Integrity check failed.

smg???