坑死了

cood:

#include <iostream>
using namespace std;
int main(){
    int x,y;
    cin >> x >> y;
    int a[x][y];
    int b;
    for(int cx = 0;cx < x;cx++){
        for(int cy = 0;cy < y;cy++){
            cin >> b;
            a[cx][cy] = b;
        }
    }
    cin >> x >> y;
    cout << a[x][y] << endl;
}