#include <cstdio>
#define MAX 100010
using namespace std;
char sir[MAX],*p=sir;
long eval();
long termen();
long factor();
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    gets(sir);
    printf("%ld\n",eval());
    return 0;
}
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;
}