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);
    }
 	if (op == '-') {
      console.log(a - b);
    }
}
 
main(require("fs").readFileSync("/dev/stdin", "utf8"));