#include <bits/stdc++.h>
#define MAXSZ 100005

using namespace std;

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

int getOperatorOrder(char op) {
    if (op == '*' || op == '/')
        return 2;
    if (op == '+' || op == '-')
        return 1;
    return 0;
}

int eval(int a, int b, char op) {
    switch (op) {
        case '+':
            return a + b;
        case '-':
            return a - b;
        case '*':
            return a * b;
        case '/':
            return a / b;
        default:
            return 0;
    }
}

int eval(char expr[]) {
    stack<int> operands;
    stack<char> operators;

    for (int i = 0; expr[i]; i++) {
        if (expr[i] >= '0' && expr[i] <= '9') {
            int number = 0;
            while (expr[i] >= '0' && expr[i] <= '9')
                number = number * 10 + (expr[i++] - '0');
            i--;
            operands.push(number);
        } else if (expr[i] == '(') {
            operators.push(expr[i]);
        } else if (expr[i] == ')') {
            while (!operators.empty() && operators.top() != '(') {
                char op = operators.top(); operators.pop();
                int b = operands.top(); operands.pop();
                int a = operands.top(); operands.pop();
                operands.push(eval(a, b, op));
            }
            operators.pop();
        } else {
            while (
                    !operators.empty() &&
                    getOperatorOrder(operators.top()) >= getOperatorOrder(expr[i])
            ) {
                char op = operators.top(); operators.pop();
                int b = operands.top(); operands.pop();
                int a = operands.top(); operands.pop();
                operands.push(eval(a, b, op));
            }
            operators.push(expr[i]);
        }
    }

    while (!operators.empty()) {
        char op = operators.top(); operators.pop();
        int b = operands.top(); operands.pop();
        int a = operands.top(); operands.pop();
        operands.push(eval(a, b, op));
    }

    return operands.top();
}

int main() {
    char expr[MAXSZ];
    fin.getline(expr, MAXSZ);
    fout << eval(expr);
    return 0;
}