#include <iostream>
#include <fstream>
#include <string>
#include <ctype.h>

using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");

/// recursivitate indirecta trebuie declarate toate functiile la inceput

char s[1000005];
int pos = 0;

int add(); // se ocupa de + si -
int mult(); // * /
int fact(); // () si factori 

int main (){
    in >> s;
    out << add();
    return 0;
}

int add (){
    int res = mult();
    while (s[pos] == '+' || s[pos] == '-'){
        if (s[pos] == '+'){
            pos++;
            res += mult();
        }
        else{
            pos++;
            res -= mult();
        }
    }
    return res;
}

int mult(){
    int res = fact();
    while (s[pos] == '*' || s[pos] == '/'){
        if (s[pos] == '*'){
            pos++;
            res *= fact();
        }
        else{
            pos++;
            res /= fact();
        }
    }
    return res;
}

int fact(){
    int res = 0;
    if (s[pos] == '('){
        pos++;
        res = add();
        pos++;
    }
    else{
        while (isdigit(s[pos])){
            res = res * 10 + (s[pos] - '0');
            pos++;
        }
    }
    return res;
}