/in/foo.cc: In function 'int main()':
/in/foo.cc:27:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i = 1;i <= n;++ i)
     ^~~
/in/foo.cc:29:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for(int i = n;i >= 1;-- i){
  ^~~