#include <fstream>
#include <cstring>
#include <vector>
#define MX 100005
using namespace std;
// -1=+, -2=-, -3=*, -4=/

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int l;
char s[41];
vector<char> inf;  //infix si stack
vector<int> pof,rez;    //postfix si rezultatul final

void citire()
{
    fin>>s;
    l = strlen(s);
}

int numar(int &i)
{
    int nr=0;
    while(s[i]>='0' && s[i]<='9')
    {
        nr = nr*10 + s[i] - '0';
        i++;
    }
    i--;
    return nr;
}

void infix_to_postfix()
{
    int i;
    char x;
    for(i=0; i<l; i++)
    {
        if(s[i]=='*' || s[i]=='/')
        {
            inf.push_back(s[i]);
        }
        else

        if(s[i]=='+' || s[i]=='-')
        {
            if(!inf.empty())
            {
                x = inf.back();
                while(x=='*' || x=='/')
                {
                    inf.pop_back();
                    //pof.push_back(x);
                    if(x == '*') pof.push_back(-3);
                    else pof.push_back(-4);
                    x = inf.back();
                }
            }
            inf.push_back(s[i]);
        }
        else

        if(s[i]=='(')
        {
            inf.push_back(s[i]);
        }
        else

        if(s[i]==')')
        {
            x = inf.back();
            while(x != '(')
            {
                inf.pop_back();
                //pof.push_back(x);
                if(x == '+') pof.push_back(-1);
                if(x == '-') pof.push_back(-2);
                if(x == '*') pof.push_back(-3);
                if(x == '/') pof.push_back(-4);
                x = inf.back();
            }
            inf.pop_back();
        }
        else
        {
            pof.push_back(numar(i));
        }

        /*fout<<i;
        fout.flush();*/
    }

    while(!inf.empty())
    {
        //pof.push_back(inf.back());
        x = inf.back();
        if(x == '+') pof.push_back(-1);
        if(x == '-') pof.push_back(-2);
        if(x == '*') pof.push_back(-3);
        if(x == '/') pof.push_back(-4);
        inf.pop_back();
    }

    //fout<<pof[5];
}

void postfix_to_rez()
{
    vector<int>::iterator it;
    int i,o1,o2;
    for(it=pof.begin(); it!=pof.end(); it++)
    {
        if(*it >= 0)
        {
            rez.push_back(*it);
        }
        else
        {
            o1 = rez.back(); rez.pop_back();
            o2 = rez.back(); rez.pop_back();
            switch(*it)
            {
                case -1: rez.push_back((o2+o1) % 1000000000); break;
                case -2: rez.push_back((o2-o1) % 1000000000); break;
                case -3: rez.push_back((o2*o1) % 1000000000); break;
                case -4: rez.push_back((o2/o1) % 1000000000); break;
            }
        }
    }
}

int main()
{
    citire();
    infix_to_postfix(); //inf e gol, pof are postfix
    postfix_to_rez();

    fout<<rez[0];
    pof.clear();
    rez.clear();

    fin.close(); fout.close();
    return 0;
}