3AC,2RE,怎么办呀？qwq

#include <iostream>
using namespace std;

int block[201][201];

int main()
{
    int n,m,k;
    cin >> n >> m >> k;
    for(int i = 1;i <= m;i++)
    {
        int o,p;
        cin >> o >> p;
        block[o][p] = 1;
        block[o][p+1] = 1;
        block[o][p+2] = 1;
        block[o][p-1] = 1;
        block[o][p-2] = 1;
        block[o+1][p+1] = 1;
        block[o+1][p-1] = 1;
        block[o-1][p+1] = 1;
        block[o-1][p-1] = 1;
        block[o+1][p] = 1;
        block[o-1][p] = 1;
        block[o+2][p] = 1;
        block[o-2][p] = 1;
    }
    for(int i = 1;i <= k;i++)
    {
        int o,p;
        cin >> o >> p;
        for(int x = -2;x <= 2;x++)
        {
            for(int y = -2;y <= 2;y++)
            {
                block[o+x][p+y] = 1;
            }
        }
    }
    int cnt = n*n;
    for(int i = 1;i <= n;i++)
    {
        for(int j = 1;j <= n;j++)
        {
            if(block[i][j] == 1)
            cnt --;
        }
    }
    cout << cnt;
    
    return 0;
}

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