#include <iostream>
#include <fstream>
using namespace std;
const int NMAX=100000;
int i;
char s[NMAX+3];
int term();
int ev()
{
    int rez=term();
    while(s[i]=='+'||s[i]=='-')
    {
        if(s[i]=='+')
        {
            i++;
            rez+=term();

        }
        if(s[i]=='-')
        {
            i++;
            rez-=term();

        }
    }
    return rez;
}
int fact()
{
    int rez=0;
    if(s[i]=='(')
    {
        i++;
        rez=ev();
        i++;
    }
    else
    {
        while(isdigit(s[i]))
        {
            rez=rez*10+s[i]-'0';
            i++;
        }
    }
    return rez;
}
int term()
{
    int rez=fact();
    while(s[i]=='*'||s[i]=='/')
    {
        if(s[i]=='*')
        {
            i++;
            rez*=fact();
        }
        if(s[i]=='/')
        {
            i++;
            rez/=fact();
        }
    }
    return rez;
}
int main()
{
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");
    cin>>s;
    cout<<ev()<<'\n';
    return 0;
}