#include <stdio.h>
#include <math.h>
int replaceZerasWithOnes(int n)
{
    int result = 0, multiplier = 1;
    while (n != 0)
    {
        int digit = n % 10;
        if (digit == 0)
        {
            digit = 1;
        }
        result = result + digit * multiplier;
        multiplier *= 10;
        n /= 10;
    }
    return result;
}
int main()
{
    int n;
    scanf("%d", &n);
    int sign = (n < 0) ? -1 : 1;
    n = abs(n);
    
    int modifiedNumber = replaceZerosWithOnes(n);
    printf("%d\n", modifiedNumber * sign);
    return 0;
}