为什么我这个会编译出错？

#pragma warning(disable:4996)
#include<stdio.h>

int main()
{
	int arr[100][100] = { 0 };
	int N = 0;
	int x, y, a, b;
	int kx, ky;
	scanf("%d", &N);
	for (int i = 0; i < N; i++)
	{
		scanf("%d %d %d %d", &y, &x, &b, &a);
		for (int m = x; m < x + a; m++)
		{
			for (int n = y; n < y + b; n++)
			{
				arr[m][n]++;
			}
		}
	}
	scanf("%d %d", &ky, &kx);
	if (arr[kx][ky] == 0) 
	{
		printf("-1\n");
	}
	else
	{
		printf("%d\n", arr[kx][ky]);
	}
	return 0;
}