#include <bits/stdc++.h>

using namespace std;

ifstream in("expresie.in");
ofstream out("expresie.out");

string s;

int p = 0;

int priority(char k)
{
    if(k == '+' || k == '-')
        return 1;
    if(k == '*' || k == '/')
        return 2;
    return 3;
}

inline long long expresie();
inline long long termen();
inline long long factor();

long long expresie()
{
    long long t = termen();
    while(priority(s[p]) == 1)
    {
        if(s[p] == '+')
            ++p,t += termen();
        else
        if(s[p] == '-')
            ++p,t -= termen();
    }
    return t;

}

long long termen()
{
    long long t = factor();
    while(priority(s[p]) == 2)
    {
        if(s[p] == '*')
            ++p,t *= factor();
        else
        if(s[p] == '/')
            ++p,t /= factor();
    }
    return t;
}

long long factor()
{

    long long t = 0;

    if(s[p] == '(')
    {
        ++p;
        t = expresie();
        ++p;
    }
    else
    {
        while(s[p] >= '0' && s[p] <= '9')
        {
            t *= 10;
            t += s[p] - '0';
            ++p;
        }
    }
    return t;
}

int main()
{
    in >> s;
    out << expresie();

    return 0;
}