#include <fstream>

using namespace std;
int expresie();
int termen();
int factor();
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
char s[100100];
int i;
int expresie()
{
    int r=termen();
    while(s[i]=='+' || s[i]=='-')
        if(s[i]=='+')
        {
            i++;
            r=r+termen();
        }
        else
        {
            i++;
            r=r-termen();
        }
    return r;
}
int termen()
{
    int r=factor();
    while(s[i]=='*' || s[i]=='/')
        if(s[i]=='*')
        {
            i++;
            r=r*factor();
        }
        else
        {
            i++;
            r=r/factor();
        }
        return r;
}
int factor()
{
    int r=0;
    if(s[i]=='(')
    {
        i++;
        r=expresie();
        i++;
    }
    else
    {
     r=0;
     while(s[i]>='0' &&s[i]<='9')
     {
         r=r*10+(s[i]-'0');
         i++;
     }
    }
    return r;
}
int main()
{
    cin>>s;
    i=0;
    cout<<expresie();
    return 0;
}