rt，输出比答案算少了

#include <iostream>
#include <cstdio>
#include <set>
#include <string>
#include <cmath>

using namespace std;

int main () {
    // freopen ("explore5.in", "r", stdin);
    // freopen ("explore5.out", "w", stdout);
	int T;
	cin >> T;

	while (T --) {
		int n, m, k, ans = 1;
		int x, y, d;
		cin >> n >> m >> k >> x >> y >> d;
		char a[1002][1002];

		for (int i = 1; i <= n; i ++) {
			for (int j = 1; j <= m; j ++) {
				cin >> a[i][j];
			}
		}

		set <int> se;
        string s123 = to_string(y);
        int nnn = s123.size();
        nnn = pow(10, nnn);
        se.insert(x * nnn + y);

		while (k --) {
//			printf ("实际位置：%d %d %d\n", x, y, d);
			int x_ = x, y_ = y, d_ = d;

			if (d == 0) {
				y_ ++;
			} else if (d == 1) {
				x_ ++;
			} else if (d == 2) {
				y_ --;
			} else {
				x_ --;
			}

			d = d;
//			printf ("%d %d %d\n", x_, y_, d_);

			if ((x_ >= 1 && x_ <= n) && (y_ >= 1 && y_ <= m) && a[x_][y_] == '.') {
				ans ++;
				string s12 = to_string(y_);
				int nnnn = s12.size();
                nnnn = pow(10, nnnn);
				se.insert(x_ * nnnn + y_);
//				printf ("进入的%d %d %d\n", x_, y_, d_);
				x = x_, y = y_;
			} else {
				d = (d + 1) % 4;
			}
		}

		cout << se.size() << endl;
	}

	return 0;
}
/*
1
5 5 20
1 1 0
.....
.xxx.
.x.x.
..xx.
x....
*/