784.cpp

#include <bits/stdc++.h>
using namespace std;
int dx[] = {-1, 0, 0, 1};
int dy[] = {0, -1, 1, 0};
char a[100][100];
int N, M;
void call(int i, int j) {
    M = strlen(a[i]);
    if (i < 0 || j < 0 || i >= N || j >= M) return;
    if (a[i][j] != ' ' && a[i][j] != '*') return;
    a[i][j] = '#';
    for (int k = 0; k < 8; k++) {
        call(i + dx[k], j + dy[k]);
    }
    return;
}

int main() {
    int n, m, i, j, k, tc, t = 1;
    cin >> tc;
    getchar();
    while (tc--) {
        i = 0;
        while (gets(a[i])) {
            if (a[i][0] == '_') break;
            i++;
        }
        N = i;
        for (i = 0; i < N; i++) {
            M = strlen(a[i]);
            for (j = 0; j < M; j++) {
                if (a[i][j] == '*') {
                    call(i, j);
                }
            }
        }
        for (i = 0; i <= N; i++) puts(a[i]);
    }
    return 0;
}