"use strict";

function main(input){
  const args = input.trim().split(' ');
  if(args[1] == '+') 
    console.log(parseInt(args[0], 10) + parseInt(args[2], 10));
  else
    console.log(parseInt(args[0], 10) - parseInt(args[2], 10));
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));  