/in/foo.cc: In function 'int main()':
/in/foo.cc:20:15: error: 'ans' was not declared in this scope; did you mean 'abs'?
   20 |         cout<<ans<<endl;
      |               ^~~
      |               abs
/in/foo.cc:9:9: warning: unused variable 'random_num' [-Wunused-variable]
    9 |     int random_num = rand();
      |         ^~~~~~~~~~