#include <bits/stdc++.h>
using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

stack<int> operands;  // Stiva pentru numere
stack<char> operators; // Stiva pentru operatori

// Functie ce returneaza precedenta operatorului
int precedence(char op) {
    if (op == '+' || op == '-') return 1;
    if (op == '*' || op == '/') return 2;
    return 0;
}

// Aplica operatia de varf dintre doi operanzi si returneaza rezultatul
int applyOperation(int a, int b, char op) {
    if (op == '+') return a + b;
    if (op == '-') return a - b;
    if (op == '*') return a * b;
    if (op == '/') return a / b; // Impartire intreaga
    return 0;
}

// Evalueaza expresia
int evaluate(string &expr) {
    int n = expr.size();

    for (int i = 0; i < n; i++) {
        char ch = expr[i];

        if (isdigit(ch)) {
            int num = 0;
            while (i < n && isdigit(expr[i])) {
                num = num * 10 + (expr[i] - '0');
                i++;
            }
            i--; // Revenim un pas inapoi după ultima cifră
            operands.push(num);
        }
        else if (ch == '(') {
            operators.push(ch);
        }
        else if (ch == ')') {
            while (!operators.empty() && operators.top() != '(') {
                int b = operands.top(); operands.pop();
                int a = operands.top(); operands.pop();
                char op = operators.top(); operators.pop();
                operands.push(applyOperation(a, b, op));
            }
            operators.pop(); // Eliminăm '('
        }
        else { // Operator +, -, *, /
            while (!operators.empty() && precedence(operators.top()) >= precedence(ch)) {
                int b = operands.top(); operands.pop();
                int a = operands.top(); operands.pop();
                char op = operators.top(); operators.pop();
                operands.push(applyOperation(a, b, op));
            }
            operators.push(ch);
        }
    }

    // Aplicăm operatorii rămași
    while (!operators.empty()) {
        int b = operands.top(); operands.pop();
        int a = operands.top(); operands.pop();
        char op = operators.top(); operators.pop();
        operands.push(applyOperation(a, b, op));
    }

    return operands.top();
}

int main() {
    string expr;
    fin >> expr;
    fout << evaluate(expr) << endl;
    return 0;
}