AGC016C +/- Rectangle（构造）

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
long long Mat[505][505];
long long n, m, r, c;
int main()
{
    cin>>r>>c>>n>>m;
    for(int i = 1; i <= r; i++)
        for(int j = 1; j <= c; j++)
            Mat[i][j] = 1000;
    for(int i = n; i <= r; i += n)
        for(int j = m; j <= c; j += m)
            Mat[i][j] = -n*m*1000 + 999;
    long long sum = 0;
    for(int i = 1; i <= r; i++)
        for(int j = 1; j <= c; j++)
            sum += Mat[i][j];
    if(sum < 0) { cout<<"No"<<endl; }
    else {
        cout<<"Yes"<<endl;
        for(int i = 1; i <= r; i++){
            for(int j = 1; j <= c; j++)
                cout<<Mat[i][j]<<" ";
            cout<<endl;
        }
    }

}