/in/foo.cc: In function 'int main()':
/in/foo.cc:32:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i = 1 ; i <= n ; ++ i)
     ^~~
/in/foo.cc:34:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  sort(rk + 1 , rk + n + 1 , cmp2);
  ^~~~