#include <bits/stdc++.h>

using namespace std;

int i = 0;
string s;

int f1();
int f2();
int f3();

int f1() {
	int ans = f2();
	while(s[i] == '+' || s[i] == '-') {
		if(s[i] == '+') {
			++i;
			ans += f2();
		} else {
			++i;
			ans -= f2();
		}
	}
	return ans;
}

int f2() {
	int ans = f3();
	while(s[i] == '*' || s[i] == '/') {
		if(s[i] == '*') {
			++i;
			ans *= f3();
		} else {
			++i;
			ans /= f3();
		}
	}

	return ans;
}

int f3() {
	int ans = 0;
	if(s[i] == '(') {
		++i;
		ans = f1();
		++i;
	} else {
		while(isdigit(s[i])) {
			ans = (ans<<1) + (ans<<3) + s[i] - '0';
			++i; 
		}
	}

	return ans;
}

int main() {
	#ifdef BLAT
		freopen("input", "r", stdin);
	#else
		freopen("evaluare.in", "r", stdin);
		freopen("evaluare.out", "w", stdout);
	#endif

	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);

	cin >> s;
	cout << f1() << '\n';
	return 0;
}