题目链接：?problem=1152
代码：
;int n, m;int p[1010][1010];int book[1010];int match[1010];int dfs(int u){for (int v = 0; v < n*m; v++){if (book[v] == 0 && p[u][v] == 1){book[v] = 1;if (match[v] == 0 || dfs(match[v])){match[v] = u;return 1;}}}return 0;}char s[110][110];int dir[][2] = { {1,0},{-1,0},{0,1},{0,-1} };int is_ok(int x, int y){if (x >= 0 && x < n && y >= 0 && y < m) return 1;return 0 ;}int main(){int t;int cases = 1;scanf(“%d”, &t);while (t–){scanf(“%d%d”, &n, &m);for (int i = 0; i < n; i++) scanf(“%s”, s[i]);int ans = 0;memset(match, 0, sizeof(match));memset(p, 0, sizeof(p));int sum = 0;for (int i = 0;i < n;i++)for (int j = 0;j < m;j++){if (s[i][j] == ‘*’){sum++;for (int k = 0;k < 4;k++){int x = i + dir[k][0];int y = j + dir[k][1];if (is_ok(x, y) && s[x][y] == ‘*’)p[i*m + j][x*m + y] = 1;}}}for (int i = 0; i < n*m; i++){memset(book, 0, sizeof(book));if (dfs(i))ans++;}printf(“Case %d: %d\n”, cases++, sum – ans / 2);}return 0;}
，而在于当时的那份心情。可是旅行的彼时那刻我的心情一直是好的吗？
