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

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