#include <iostream>
#include <fstream>

using namespace std;

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

const int MAX=100003;
char s[MAX], *p=s;

int expr();
int termen();
int factor();

int main()
{
    fin>>s;
    fout<<expr();
    return 0;
}

int expr()
{
    int answ=termen();
    while(*p=='+' || *p=='-')
        if(*p=='+')
        {
            p++;
            answ=answ+termen();
        }
        else
        {
            p++;
            answ=answ-termen();
        }
    return answ;
}

int termen()
{
    int answ=factor();
    while(*p=='*' || *p=='/')
        if(*p=='*')
        {
            p++;
            answ=answ*factor();
        }
        else
        {
            p++;
            answ=answ/factor();
        }
    return answ;
}

int factor()
{
    int answ=0;
    if(*p=='(')
    {
        p++;
        answ = expr();
        p++;
    }
    else
    {
        while('0'<=*p && *p<='9')
        {
            answ=answ*10+*p-'0';
            p++;
        }

    }
    return answ;
}