#include <iostream>
#include <fstream>

using namespace std;

char s[100010], *p;
ifstream f ("evaluare.in");
ofstream g ("evaluare.out");
int suma();

int numar()
{
    int ret=0;
    while(*p>='0' && *p<='9')
    {
        ret = ret * 10 + *p - '0';
        p++;
    }
    return ret;
}

int par(){
    int ret;
    if (*p=='(')
        {
            p++;
            ret=suma();
            p++;
            return ret;
        }
        return numar();

}

int produs(){

    int ret = par();
    while(*p=='*' || *p=='/'){
        if(*p=='*'){
            p++;
            ret = ret * par();}
        else{
            p++;
            ret = ret / par();
        }
    }
    return ret;
}

int suma(){

    int ret = produs();
    while(*p=='+' || *p=='-'){
        if(*p=='+'){
            p++;
            ret = ret + produs();}
        else{
            p++;
            ret = ret - produs();
        }
    }
    return ret;
}

int main()
{
    f>>s;
    p=s;
    g<<suma();

    return 0;
}