#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

int i;
string s;


int expresion();
int term(); 
int fact(); 

int expresion() {
    int rez = term();

    while (s[i] == '+' || s[i] == '-') {
        i++;
        if (s[i - 1] == '+') {
            rez += term();
        } else {
            rez -= term();
        }
    }

    return rez;
}

int term() {
    int rez  = fact();

    while (s[i] == '*' || s[i] == '/') {
        i++;
        if (s[i - 1] == '*') {
            rez *= fact();
        } else {
            rez /= fact();
        }
    }

    return rez;
}

int fact() {
    int rez = 0;

    if (s[i] == '(') {
        i++;
        rez = expresion();
        i++;
    }

    while (s[i] >= '0' && s[i] <= '9') {
        rez *= 10;
        rez += s[i] - '0';
        i++;
    }

    return rez;
}

int main() {
    ifstream cin ("evaluare.in");
    ofstream cout ("evaluare.out");

    cin >> s;

    cout << expresion();

    return 0;
}