#include <fstream>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
char S[100010], *p=S;
long termen();
long factor();
long eval()
 {
    long r = termen();
    while ( *p=='+' or *p=='-' )
    {
        switch ( *p )
         {
            case '+':
                ++p;
                r += termen();
                break;
            case '-':
                ++p;
                r -= termen();
                break;
        }
    }
    return r;
}
long termen() {
    long r = factor();
    while ( *p=='*' or *p=='/' )
    {
        switch ( *p )
         {
            case '*' :
                ++p;
                r *= factor();
                break;
            case '/':
                ++p;
                r /= factor();
                break;
        }
    }
    return r;
}
long factor() {
    long r=0;
    if ( *p == '(' )
    {
        ++p;
        r = eval();
        ++p;
    }
    else
     {
        while ( *p>='0' and *p<='9' )  {
            r = r*10 + *p - '0';
            ++p;
        }
    }
    return r;
}
int main() {
    cin>>S;
    cout<<eval();
    return 0;
}