function main(input){
  const args = input.split(" ");
  const A = parseInt(args[0]),
        op = args[1],
        B = parseInt(args[2]);
  
  if (op === "+")
    console.log(A + B);
  else
    console.log(A - B);
}

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