/in/foo.cc: In function 'int main()':
/in/foo.cc:41:22: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     int i; cin >> n; for (i = 1; i <= n; i++)
                      ^~~
/in/foo.cc:42:56: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
         scanf("%s", s + 1), l = strlen(s + 1), ins(i); dfs(1);
                                                        ^~~