#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <set>
using namespace std;

int main(){
	string s;
	cin >> s;
	int x,y;
	char op;
	sscanf(s.c_str(), "%d%1[+-]%d", &x,&op,&y);

	//cerr << x << " " << op << " " << y << endl;
	if(op == '+'){
		cout << x - y << endl;
	}
	if(op == '-'){
		cout << x + y << endl;
	}
	return 0;
}