#include <bits/stdc++.h>
#define ll long long
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
string s;
ll p;

ll termen();
ll factor();

ll eval() {
    ll r = termen();
    while (s[p] == '+' || s[p] == '-') {
        if (s[p] == '+') {
            ++p;
            r += termen();
        }
        else if (s[p] == '-') {
            ++p;
            r -= termen();
        }
    }
    return r;
}

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

ll factor() {
    ll r = 0;
    if (s[p] == '(' || s[p] == ')') {
        ++p;
        r = eval();
        ++p;
    }
    else
        while (s[p] >= '0' && s[p] <= '9') {
            r = r * 10 + (s[p] - '0');
            ++p;
        }
    return r;
}

int main() {
    getline(fin, s);
    fout << eval();
    return 0;
}