样例过了提交wa求助

#include <bits/stdc++.h>
using namespace std;

int n;
int m;
array <array <int, 505>, 505> a;
bool ifarrive;
int sn;
int sm;

inline void init()
{
    scanf("%d%d", &n, &m);
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++)
        {
            char tmp;
            cin >> tmp;
            if (tmp == 's')
            {
                sn = i;
                sm = j;
            }
            a[i][j] = tmp;
        }
    }
}

inline bool check(int r, int c)
{
    if (r < 0 || c < 0 || r >= n || c >= n || a[r][c] < 40)
    {
        return 0;
    }
    return 1;
}

void dfs(int r, int c)
{
    if (a[r][c] == 'g')
    {
        ifarrive = true;
        return;
    }
    a[r][c] -= 200;
    if (check(r - 1, c))
    {
        dfs(r - 1, c);
    }
    if (check(r + 1, c))
    {
        dfs(r + 1, c);
    }
    if (check(r, c + 1))
    {
        dfs(r, c + 1);
    }
    if (check(r, c - 1))
    {
        dfs(r, c - 1);
    }
    a[r][c] += 200;
}

signed main(signed argc, char **argv)
{
    init();
    dfs(sn, sm);
    if (ifarrive)
    {
        printf("Yes");
    }
    else
    {
        printf("No");
    }
    return 0;
}