#include <cstdio>
#include <vector>
#include <stack>
#include <cstring>

using namespace std;

char exp[100002];

vector<int> postfix_st;
stack<int> op_st;


int get_priority(char op) {
	if (op == '*' || op == '/')
		return 1;
	if (op == '+' || op == '-')
		return 2;
}


int main() {
	freopen("evaluare.in", "r", stdin);
	freopen("evaluare.out", "w", stdout);

	scanf("%s\n", exp);
	int n = strlen(exp);
	if (exp[n-1] == '\n') {
		exp[n-1] = 0;
		--n;
	}


	int current_number = 0, res, a, b;
	for(int i=0; i<n; ++i)
		if (exp[i] >= '0' && exp[i] <='9') {
			current_number = 0;
			while(exp[i] >= '0' && exp[i] <='9' && i <n) {
				current_number = current_number * 10 + exp[i] - '0';
				++i;
			}
			--i;
			postfix_st.push_back(current_number + '0');
		}
		else {
			if (exp[i] == '(') {
				op_st.push(exp[i]);
				continue;
			}
			if (exp[i] == ')') {
				while(op_st.top() != '(') {
					postfix_st.push_back(op_st.top());
					op_st.pop();
				}
				op_st.pop();
				continue;
			}
			while (op_st.size() && op_st.top() != '(' && get_priority(exp[i]) >= get_priority(op_st.top())) {
				postfix_st.push_back(op_st.top());
				op_st.pop();
			}
			op_st.push(exp[i]);

		}

	while(op_st.size()) {
		postfix_st.push_back(op_st.top());
		op_st.pop();
	}




	for(int i=0; i<postfix_st.size(); ++i) {
		if (postfix_st[i] > '0')
			op_st.push(postfix_st[i] - '0');
		else {
			a = op_st.top();
			op_st.pop();
			b = op_st.top();
			op_st.pop();

			switch(postfix_st[i]) {
				case '+':
					res = a + b;
					break;
				case '-':
					res = b-a;
					break;
				case '/':
					res = b/a;
					break;
				case '*':
					res = a*b;
					break;
			}

			op_st.push(res);
		}
	}

	printf("%d\n", op_st.top());
	return 0;
}