#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e5 + 5;

char *s;

int eval();
int term();
int get();

int eval()  {
    int t = term();
    while(*s == '+' || *s == '-')  {
        if(*s == '+')
            s++, t += term();
        else
            s++, t -= term();
    }
    return t;
}

int term()  {
    int t = get();
    while(*s == '*' || *s == '/')  {
        if(*s == '*')
            s++, t *= get();
        else
            s++, t /= get();
    }
    return t;
}

int get()  {
    int t;
    if(*s == '(')  {
        s++;
        t = eval();
        s++;
    }
    else  {
        int semn = 1;
        if(*s == '-')
            semn = -1, s++;
        t = 0;
        while(isdigit(*s))
            t = t * 10 + *s - '0', s++;
        t *= semn;
    }
    return t;
}

int main()  {
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");
    s = new char[maxn];
    cin >> s;
    cout << eval();
    return 0;
}