foo.cc: In function 'void Dp(int, int)':
foo.cc:37:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if (!ch) f[u] = 1; return;
     ^~
foo.cc:37:24: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     if (!ch) f[u] = 1; return;
                        ^~~~~~
foo.cc: In function 'void Dfs(int, int, int)':
foo.cc:64:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if (!ch) f[u] = 1; return;
     ^~
foo.cc:64:24: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     if (!ch) f[u] = 1; return;
                        ^~~~~~
foo.cc: In function 'int main()':
foo.cc:85:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while (cnt && !cmd[cnt - 1].v) --cnt;    printf("%d\n%d", ans, cnt);
     ^~~~~
foo.cc:85:46: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
     while (cnt && !cmd[cnt - 1].v) --cnt;    printf("%d\n%d", ans, cnt);
                                              ^~~~~~
foo.cc:69:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("catch.in", "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:70:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("catch.out", "w", stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:71:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
foo.cc:74:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int u, v; scanf("%d%d", &u, &v);
                   ~~~~~^~~~~~~~~~~~~~~~

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