#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main() {
	string s;
	cin >> s;
	int opidx = 1;
	while(s[opidx] != '+'&& s[opidx] != '-') opidx++;
	int x = stoi(s.substr(0, opidx));
	int y = stoi(s.substr(opidx + 1, s.size() - opidx));
	if(s[opidx] == '+') {
		cout << x - y << endl;
	}
	else {
		cout << x + y << endl;
	}
}