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

using namespace std;

char v[100001];
int p = 0;
int n;
int expresie();
int termen();
int factor();

int expresie(){
    int val = termen();
    while(p < n && (v[p] == '+' || v[p] == '-')){
        if(v[p] == '+'){
            p++;
            val += termen();
        }else{
            p++;
            val -= termen();
        }
    }
    return val;
}

int termen(){
    int val = factor();
    while(p < n && (v[p] == '*' || v[p] == '/')){
        if(v[p] == '*'){
            p++;
            val *= factor();
        }else{
            p++;
            val /= factor();
        }
    }
    return val;
}

int factor(){
    int semn = 1;
    int val;
    while(v[p] == '+' || v[p] == '-'){
        if(v[p] == '-')
            semn = -semn;
        p++;
    }
    if(v[p] == '('){
        p++;//sar de paranteza deschisa
        val = expresie();
        p++;
    }else{
        //construim numarul
        int nr = 0;
        while(v[p] >= '0' && v[p] <= '9'){
            nr = nr*10 + v[p] - '0';
            p++;
        }
        val = nr;
    }
    val = val*semn;

    return val;
}

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

    fin.getline(v, 100001);

    n = strlen(v);

    fout << expresie();

    fin.close();
    fout.close();
    return 0;
}