#include <iostream>
#include <fstream>
#include <cmath>
#define nmx 100005
using namespace std;
char s[nmx],*p=s;
long long termen();
long long factor();
long long eval()
{
    long long nr=termen();
    while (*p=='+' || *p=='-')
    {
        if (*p=='+')
        {
            p++;
            nr+=termen();
        }
        else if (*p=='-')
        {
            p++;
            nr-=termen();
        }
    }
    return nr;
}
long long termen()
{
    long long nr=factor();
    while (*p=='*' || *p=='/')
    {
        if (*p=='*')
        {
            p++;
            nr*=factor();
        }
        else if (*p=='/')
        {
            p++;
            nr/=factor();
        }
    }
    return nr;
}
long long factor()
{
    long long nr=0;
    if (*p=='(')
    {
        p++;
        nr=eval();
        p++;
    }
    else
    {
        while (*p>='0' && *p<='9')
        {
            nr=nr*10+*p-'0';
            p++;
        }
    }
    return nr;
}
int main()
{
    ifstream f ("evaluare.in");
    ofstream g ("evaluare.out");
    f>>s;
    g<<eval();
}