#include <fstream>

using namespace std;
ifstream cin ("evaluare.in");
ofstream cout ("evaluare.out");
char *p,s[100001];
int eval();
int termen();
int factor();
int eval()
{
    int rez=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+')
        {
            p++;
            rez+=termen();
        }
        else
        {
            p++;
            rez-=termen();
        }
    }
    return rez;
}
int termen()
{
    int rez=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            p++;
            rez*=factor();
        }
        else
        {
            p++;
            rez/=factor();
        }
    }
    return rez;
}
int factor()
{
    int rez=0;
    if(*p=='(')
    {
        p++;
        rez=eval();
        p++;
    }
    else
    {
        while(*p<='9'&&*p>='0')
        {
            rez=rez*10+*p-'0';
            p++;
        }
    }
    return rez;
}
int main()
{
    cin.getline(s,100001);
    p=s;
    cout<<eval();
    return 0;
}