#include<bits/stdc++.h>
#include<iostream>
using namespace std;
int main(){
	int A,B;
	char x;
	scanf("%d%d",&A,&B);
	cin>>x;
	if(x=='+'){
		printf("%d",A+B);
	}
	if(x=='-'){
		printf("%d",A-B);
	}
	return 0;
}