"use strict";
const Main = (input) =>{
	let xs = input.trim().split(' ');
    let ans = 0;
    let A = parseInt(xs[0],10);
    let B = parseInt(xs[2],10);
    if(xs[1] == '-'){
    	ans = A - B;
    } else if(xs[1] == '+') {
    	ans = A + B;
    }
    console.log(ans);
}
Main(require('fs').readFileSync('/dev/stdin','utf8'));