#include <fstream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
char v[100001];
int t;
int expresie();
int termen();
int factor();

int expresie()
{
    int suma=termen();
    while(v[t]=='+' || v[t]=='-')
    {
        if(v[t]=='+')
        {
            t++;
            suma=suma+termen();
        }
        else if(v[t]=='-')
        {
            t++;
            suma=suma-termen();
        }
    }
    return suma;
}
int termen()
{
    int prod=factor();
    while(v[t]=='*' || v[t]=='/')
    {
        if(v[t]=='*')
        {
            t++;
            prod=prod*factor();
        }
        else if(v[t]=='/')
        {
            t++;
            prod=prod/factor();
        }
    }
    return prod;
}
int factor()
{
    int semn=1, suma=0;
    while(v[t]=='-')
    {
        semn=semn*(-1);
        t++;
    }
    if(v[t]=='(')
    {
        t++;
        suma=expresie();
        t++;
        return semn*suma;
    }
    while(v[t]>='0'&& v[t] <= '9')
    {
        suma=suma*10+v[t]-'0';
        t++;
    }
    return semn*suma;
}
int main()
{
    in>>v;
    t=0;
    out << expresie();

    return 0;
}