请问高手一下下，为啥t[1000][1000]就不行，不是范围就是1000吗？

#include<iostream>
using namespace std;
int t[1000][1000];

int main()
{
    int n, m, x1, x2, y1, y2;
    cin >> n>>m ;
    for (int k = 1; k <= m; ++k)
    {
        cin >> x1 >> y1 >> x2 >> y2;
        for (int i = x1; i <= x2; ++i)
            for (int j = y1; j <= y2; ++j)
                ++t[i][j];
    }
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= n; ++j)
            cout << t[i][j] << " ";
        cout << endl;
    }
}