#include <iostream>
#include <fstream>

#define LL long long
#define max 100010
using namespace std;
char s[max],*p=s;

long termen();
long factor();
long eval()
{
    long r=factor();
    while(*p=='+' || *p=='/')
    {
        switch(*p)
        {
            case '+':
                p++;
                r+=factor();
                break;
            case '-':
                p++;
                r-=factor();
                break;
        }
    }
    return r;
}
long factor()
{
    long r=termen();
    while(*p=='/' || *p=='*')
    {
        switch(*p)
        {
            case '*':
                p++;
                r*=termen();
                break;
            case '/':
                p++;
                r/=termen();
                break;
        }
    }
    return r;
}
long termen()
{
 LL r=0;
    if(*p=='(')
       {
           p++;
           r=eval();
           p++;
       }
    else
        {while(*p>='0' && *p<='9')
            {r=r*10+*p-'0';
            p++;}
        }
    return r;
}
int main()
{
        freopen("evaluare.out","w",stdout);
        fgets(s, max, fopen("evaluare.in", "r"));
        printf("%ld\n",eval());
    return 0;
}