#include <cstdio>
#include <cstring>

using namespace std;

const int M=100005;
char a[M];
int sir[M], n, m, i;

int ord2();
int ord1();
int num();

int ord1()
{
    int rez=ord2();
    while (a[i]=='+' || a[i]=='-')
    {
        if (a[i]=='+')
        {
            ++i;
            rez+=ord2();
        }
        else
        {
            ++i;
            rez-=ord2();
        }
    }
    return rez;
}

int ord2()
{
    int rez=num();
    while (a[i]=='*' || a[i]=='/')
    {
        if (a[i]=='*')
        {
            ++i;
            rez*=num();
        }
        else
        {
            ++i;
            rez/=num();
        }
    }
    return rez;
}

int num()
{
    int rez=0;
    if (a[i]=='(')
    {
        ++i;
        rez=ord1();
        ++i;
    }
    else
        while (a[i]>='0' && a[i]<='9')
        {
            rez=rez*10+a[i]-'0';
            ++i;
        }
    return rez;
}

int main()
{
    freopen ("evaluare.in","r",stdin);
    freopen ("evaluare.out","w",stdout);
    fgets(a,M,stdin);
    a[strlen(a)-1]=0;
    n=strlen(a);
    printf ("%d\n",ord1());
    return 0;
}