function Main(input){

  input = input.split(' ');
  
  var a = Number(input[0]);
  var op = String(input[1]);
  var b = Number(input[2]);

  
var total = 0;
  if(op === '-') {
    total = a - b;
  } else {
      total = a + b;
  }
  console.log(total);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));