/in/foo.cc: In function 'int main()':
/in/foo.cc:31:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=0;i<n;i++)
  ^~~
/in/foo.cc:33:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     dfs(1);
     ^~~