#include<stdio.h>
#include<stdlib.h>
#include<string.h>
void replaceZeroWithOnes(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);
    replaceZeroWithOnes(n);
    return 0;
}