/in/foo.cc: In function 'int main()':
/in/foo.cc:8:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i=1;i<=n;++i)
     ^~~
/in/foo.cc:13:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  int  ans=0;
  ^~~