function Main(input){
var inputs = input.split(" ");
var answer;
if(inputs[1] == "+"){
  answer =new Number( inputs[0]) +new Number( inputs[2]);
}else if(inputs[1] == "-"){
  answer =new Number(inputs[0]) - new Number( inputs[2]);
}
console.log(answer);
}
Main(require('fs').readFileSync('/dev/stdin','utf8'));