代码如下，我在自己电脑用VS2019可以正常编译，答案也没问题，但是提交上去一直报错

#include <iostream>
int main()
{
	int num = 1, n, m, k, a[102][102] = { 0 };
	scanf_s("%d%d%d",&n,&m,&k);
	int mx = 0, my = 0, kx = 0, ky = 0;
	mx += 2; my += 2; kx += 2; ky += 2;
	while (num <= m)
	{
		scanf_s("%d%d", &mx, &my);
		a[mx][my] = { 1 };
		a[mx+1][my] = { 1 };
		a[mx+2][my] = { 1 };
		a[mx-1][my] = { 1 };
		a[mx-2][my] = { 1 };
		a[mx][my+1] = { 1 };
		a[mx][my+2] = { 1 };
		a[mx][my-1] = { 1 };
		a[mx][my-2] = { 1 };
		a[mx-1][my+1] = { 1 };
		a[mx-1][my-1] = { 1 };
		a[mx+1][my+1] = { 1 };
		a[mx+1][my-1] = { 1 };
		num++;
	}
	num = 1;
	if (k>0)
	{
		while (num <= k)
		{
			scanf_s("%d%d", &kx, &ky);
			a[kx][ky] = { 1 };
			for (int add = 0; add < 5; add++)
			{
				for (int add2 = 0; add2 < 5; add2++)
					a[kx - 2 +add][ky - 2 + add2] = { 1 };
			}
			num++;
		}
	}
	int number = 0;
	for (int i = 1; i<= n; i++)
	{
		for (int j = 1;j <= n; j++)
		{
			if (a[i][j] != 1)
			number++;
		}
	}
	printf("%d",number);
	return 0;
}