#include<stdio.h>
#include<stdlib.h>
#include<string.h>
void replacZeroWithOnes(int n)
{
    char str[20]
    sprintf(str,"%d", n);
    for (int i=0; str[i] !='\0';i++)
    {
        if (str[i] == '0'
        {
            str[i] = '1';
        }
    }
    printf("%s", str);
}
int main()
{
    int n;
    scanf("%d",&n);
    replaceZeroWithOner(n);
    return 0;
}