#include <fstream>
#include <cstring>

using namespace std;

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

const int N = 1e5 + 1;
char s[N];
int p;
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();
        }
        if(s[p] == '/'){
            p++;
            prod /= factor();
        }
    }
    return prod;
}

int factor()
{
    int val = 0, semn = 1;
    while(s[p] == '-'){
        p++;
        semn = -semn;
    }
    if(s[p] == '('){
        p++;
        val = expresie();
        p++;
        return semn*val;
    }
    while(isdigit(s[p])){
        val = val * 10 + s[p] - '0';
        p++;
    }
    return val*semn;
}

int main()
{
    cin.getline(s, N);
    cout << expresie();
    return 0;
}