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