#include <iostream>
#include <fstream>
using namespace std;

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

const int MAX = 100000;

char S[MAX+1], *p = S;

long long termen();
long long factor();

long long evalueaza()
{
    long long r = termen();

    while( *p == '+' || *p == '-' )
    {
        if( *p == '+' )
        {
            *p++;
            r += termen();
        }

        if( *p == '-' )
        {
            *p++;
            r -= termen();
        }
    }

    return r;
}

long long termen()
{
    long long r = factor();

    while( *p == '*' || *p == '/' )
    {
        if( *p == '*' )
        {
            *p++;
            r *= factor();
        }

        if( *p == '/' )
        {
            *p++;
            r /= factor();
        }
    }

    return r;
}

long long factor()
{
    long long r = 0;

    if( *p == '(' )
    {
        *p++;
        r = evalueaza();
        *p++;
    }
    else
    {
        while( '0' <= *p && *p <= '9' )
        {
            r = r*10 + *p - '0';
            *p++;
        }
    }

    return r;
}




int main()
{
    in>>S;
    out<<evalueaza();
    return 0;
}