/in/foo.cc: In function 'int main()':
/in/foo.cc:16:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  cin>>s+1;
       ~^~
/in/foo.cc:77:17: error: 'res2' was not declared in this scope
  cout<<max(res1,res2)<<endl;
                 ^~~~