#include <fstream>
#include <string.h>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
string sir;
int i;
int produs();
int exp();
int aduna()
{
    int rez=produs();
    while(sir[i]=='+'||sir[i]=='-')
    {
        if(sir[i]=='+')
        {
            i++;
            rez+=produs();
        }
        else
        {
            i++;
            rez-=produs();
        }
    }
    return rez;
}
int produs()
{
    int rez=exp();
    while(sir[i]=='*'||sir[i]=='/')
    {
        if(sir[i]=='*')
        {
            i++;
            rez*=exp();
        }
        else
        {
            i++;
            rez/=exp();
        }
    }
    return rez;
}
int exp()
{
    int rez=0;
    if(sir[i]=='(')
    {
        i++;
        rez=aduna();
        i++;
    }
    else
        while(sir[i]>='0'&&sir[i]<='9')
        {
            rez=rez*10+sir[i]-'0';
            i++;
        }
    return rez;
}
int main()
{
    f>>sir;
    g<<aduna();
    return 0;
}