蒟蒻求助

**数组开多大呢

#include<bits/stdc++.h>
using namespace std;
int dm[10000][10000],ta,tb,tg,tk,n,x,y;;
int main(){
    cin>>n;
    for(int i = 1;i <= n;i++){
        cin>>ta>>tb>>tg>>tk;
        for(int j = ta;j < ta + tg;j++) for(int m = tb;m < tb + tk;m++) dm[j][m]=i;
    }
    cin>>x>>y;
    if(dm[x][y]) cout<<dm[x][y];
    else cout<<"-1";
    return 0;
}