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"));