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"));