#include <fstream>

std::string s;
int curr;

int solve();

int factor() {
	int ans = 0;
	if (s[curr] == '(') {
		curr++, ans += solve(), curr++;
		return ans;
	}
	while (curr < s.size() and isdigit(s[curr])) ans = ans * 10 + (int)(s[curr++] - '0');
	return ans;
}

int termen() {
	int ans = factor();
	while (curr < s.size()) {
		if (s[curr] == '*') curr++, ans *= factor();
		else if (s[curr] == '/') curr++, ans /= factor();
		else break;
	}
	return ans;
}

int solve() {
	int ans = termen();
	while (curr < s.size()) {
		if (s[curr] == '+') curr++, ans += termen();
		else if (s[curr] == '-') curr++, ans -= termen();
		else break;
	}
	return ans;
}

int main() {
	std::ifstream fin("evaluare.in");
	std::ofstream fout("evaluare.out");
	fin >> s;
	fout<<solve();
}