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


}



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