#include<stdio.h>
#include<math.h>

int  replaceZeroWithOnes(int n){
    if(n == 0) return 1;
    
    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);
    printf("Modified number: %d\n"replaceZerosWithOnes(n));
    return 0;
}