#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    int num = n;
    int result = 0;
    int place = 1;
    if(n==0)
    {
        printf("1\n");
        return 0;
    }
    int isNegative = 0;
    if(num < 0)
    {
        isNegative = 1;
        num = -num;
    }
    while(num > 0)
    {
        int digit = num%10;
        if(num < 0)
        {
            isNegative = 1;
            num = -num;
        }
        while(num < 0)
        {
            int digit = num%10;
            if(digit == 0)
            digit = 1;
            result += digit*place;
            place *= 10;
            num/=10;
        }
        if(isNegative)
           result = -result;
        printf("%d\n",result);
        return 0;
}