#include <stdio.h>
#include <cctype>
#define Max 100001
char a[Max],*b;

int eval();
int factor();
int termen();

int termen()
{
    int r=0;
    if(*b=='(')
    {
        b++;
        r=eval();
        b++;
    } else
    {
        while( isdigit(*b) )
        {
            r=r*10+*b-'0';
            b++;
        }
    }
    return r;
}

int factor()
{
    int r=termen();
    while(*b=='*'||*b=='/')
    {
        if(*b=='*')
        {
            b++;
            r*=termen();
        }
        if(*b=='/')
        {
            b++;
            r/=termen();
        }
    }
    return r;
}

int eval()
{
    int r=factor();
    while(*b=='+'||*b=='-')
    {
        if(*b=='+')
        {
            b++;
            r+=factor();
        }
        if(*b=='-')
        {
            b++;
            r-=factor();
        }
    }
    return r;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
        scanf("%s ",a);
        b=a;
        printf("%d\n",eval());
    return 0;
}