WA 60分求调

CCF和洛谷上的给出数据都过, 但都60pts, 测试点5 7 8 10挂。

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

const int N = 1e3 + 5;
int n, m, k;
bool used[N][N], z[N][N];
int x, y, d;
char ch;

int go() {
    memset(used, 0, sizeof used);
    int res = 1;
    used[x][y] = true;
    for (int i = 1; i <= k; i++) {
        int tx = x, ty = y;
        if(d == 0)ty ++;
        if(d == 1)tx ++;
        if(d == 2)ty --;
        if(d == 3)tx --;
        if(z[tx][ty]) x = tx, y = ty;
        else d = (d + 1) % 4;
        if(!used[x][y])res ++;
        used[x][y] = true;
    }
    return res;
}

int main() {
    int T;
    scanf("%d", &T);
    while(T --) {
        scanf("%d%d%d", &n, &m, &k);
        scanf("%d%d%d", &x, &y, &d);
        for (int i = 1; i <= n; i++) {
            scanf("%c", &ch);
            for (int j = 1; j <= m; j++) {
                scanf("%c", &ch);
                z[i][j] = ch == '.';
            }
        }
        printf("%d\n", go());
    }
    return 0;
}