#include <bits/stdc++.h>
using namespace std;
char a[100113];
int i = 0;
int expresie();
int termen();
int factor();

int expresie(){
    int r = termen();
    while(a[i] == '+' or a[i] == '-'){
        if(a[i] == '+'){
            i++;
            r += termen();
        }else if(a[i] =='-'){
            i++;
            r -= termen();
        }
    }
    return r;
}
int termen(){
    int r = factor();
    while(a[i] == '*' or a[i] == '/'){
        if(a[i] == '*'){
            i++;
            r *= factor();
        }else if(a[i] == '/'){
            i++;
            r /= factor();
        }
    }
    return r;
}

int factor(){
    int r = 0;
    if(a[i] == '('){
        i++;
        r = expresie();
        i++;
    }else{
        //// sigur avem un numar deci il construim
        while(a[i] >= '0' && a[i] <= '9'){
            r = r * 10 + a[i] - '0';
            i++;
        }
    }
    return r;
}


int main(void){
    ofstream cout("evaluare.out");
    ifstream cin("evaluare.in");
    cin >> a + 1;
     i = 1;
     cout << expresie();
}