#include <cstdio>
#include <cctype>
#define NMAX 100000

using namespace std;

int eval();
int termen();
int factor();
char s[NMAX+5],*p;

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    gets(s);
    p=s;
    printf("%d",eval());

    return 0;
}

int eval()
{
    int r1=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+')
        {
            p++;
            r1+=termen();
        }
        else if(*p=='-')
        {
            p++;
            r1-=termen();
        }
    }
    return r1;
}

int termen()
{
    int r2=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            p++;
            r2*=factor();
        }
        else if(*p=='/')
        {
            p++;
            r2/=factor();
        }
    }
    return r2;
}

int factor()
{
    int r3=0;
    if(*p=='(')
    {
        p++;
        r3=eval();
        p++;
    }
    else
    {
        while(isdigit(*p))
        {
            r3=r3*10+*p-'0';
            p++;
        }
    }
    return r3;
}