#include <iostream>
#include <string>
#include <cstdlib>
#include <vector>

using namespace std;

bool num(char c)
{
	return (c >= '0' && c <= '9');
}

bool is_op(char c)
{
	return (c=='+' || c=='-' || c=='*' || c=='/');
}

int get_num(char *s)
{
	return atoi(s);
}

void seti(char *s,int& i)
{
	while (num(s[i]))
		i++;
	i--;
}

void process_op(vector<int>& st, char op)
{
	int r = st.back(); st.pop_back();
	int l = st.back(); st.pop_back();
	switch (op) {
		case '+': st.push_back(l + r); break;
		case '-': st.push_back(l - r); break;
		case '*': st.push_back(l * r); break;
		case '/': st.push_back(l / r); break;
		case '%': st.push_back(l % r); break;
	}
}

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

int main()
{
	char s[255];
	cin >> s;
	vector<int> st;
	vector<char> op;
	for (int i = 0; i < strlen(s); i++)
	{
		if (s[i] == '(')
			op.push_back('(');
		else
			if (s[i] == ')')
			{
				while(op.back() != '(')
				{
					process_op(st,op.back());
					op.pop_back();
				}
				op.pop_back();
			}
			else
				if (is_op(s[i]))
				{
					char curop = s[i];
					while (!op.empty() && priority(op.back()) >= priority(curop))
					{
						process_op(st,op.back());
						op.pop_back();
					}
					op.push_back(curop);
				}
				else
				{
					int num = get_num(s+i);
					seti(s,i);
					st.push_back(num);
				}
	}

	while (!op.empty())
	{
		process_op(st,op.back());
		op.pop_back();
	}

	cout << st.back() << '\n';
}