#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001



int main(){
	int a,b;
	char c;
	scanf("%d%c%d",&a,&c,&b);
	
	if(c=='+')cout<<a-b<<endl;
	else cout<<a+b<<endl;
	
	return 0;
}