#include <iostream>
#include <fstream>

using namespace std;

string s;
int p = 0;

int expresie();
int termen();
int factor();

int expresie(){
    int sum = termen();
    while(s[p] == '+' || s[p] == '-'){
        if(s[p] == '+'){
            p++;
            sum += termen();
        }else{
            p++;
            sum -= termen();
        }
    }
    return sum;
}

int termen(){
    int prod = factor();
    while(s[p] == '*' || s[p] == '/'){
        if(s[p] == '*'){
            p++;
            prod *= factor();
        }else{
            p++;
            prod /= factor();
        }
    }
    return prod;
}

int factor(){
    int val = 0;
    int semn = 1;
    while(s[p] == '-'){
        semn = -semn;
        p++;
    }
    if(s[p] == '('){
        p++;
        val = expresie();
        p++;
        val = val * semn;
        return val;
    }

    while('0' <= s[p] && s[p] <= '9'){
        val = val * 10 + (s[p] - '0');
        p++;
    }
    val = val * semn;
    return val;
}

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

    fin >> s;

    fout << expresie();

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