#include <iostream>
#include <fstream>
#include <deque>
#include <stack>
#define NOT_SET 1000000005
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
string exp, postfix = "";
int priority(char c) {
    if (c == '+' || c == '-') {
        return 1;
    }
    if (c == '*' || c == '/') {
        return 2;
    }
}
void createPostFixExpression() {
    stack<char> op;
    string num = "";
    for (int i = 0; i < exp.length(); ++i) {
        if (exp[i] >= '0' && exp[i] <= '9') {
            num += exp[i];
        }
        else if (num != "") {
            postfix += num +  " ";
            num = "";
        }
        if (exp[i] == '(') {
            op.push(exp[i]);
        }
        else if (exp[i] == ')') {
            while (!op.empty() && op.top() != '(') {
                postfix += op.top();
                op.pop();
            }
            if (!op.empty()) {
                op.pop();
            }
        }
        else if (exp[i] == '+' || exp[i] == '-' || exp[i] == '*' || exp[i] == '/') {
            while (!op.empty() && op.top() != '(' && priority(op.top()) >= priority(exp[i])) {
                postfix += op.top();
                op.pop();
            }
            op.push(exp[i]);
        }
    }
    postfix += num;
    while (!op.empty()) {
        postfix += op.top();
        op.pop();
    }
}
int calculate(char sign, int a, int b) {
    if (sign == '+') {
        return a + b;
    }
    if (sign == '-') {
        return a - b;
    }
    if (sign == '/') {
        return a / b;
    }
    if (sign == '*') {
        return a * b;
    }
}
int evaluatePostfix() {
    stack<int> values;
    int nr = NOT_SET;
    for (int i = 0; i < postfix.length(); ++i) {
        if (postfix[i] >= '0' && postfix[i] <= '9') {
            if (nr == NOT_SET)
                nr = 0;
            nr = nr * 10 + (postfix[i] - '0');
        }
        else if (nr != NOT_SET){
            values.push(nr);
            nr = NOT_SET;
        }

        if (postfix[i] == '+' || postfix[i] == '-' || postfix[i] == '*' || postfix[i] == '/') {
            int v1 = values.top();
            values.pop();
            int v2 = values.top();
            values.pop();
            values.push(calculate(postfix[i], v2, v1));
        }
    }
    return values.top();
}
int main()
{
    fin >> exp;
    createPostFixExpression();
    fout << evaluatePostfix() << "\n";
    return 0;
}