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

long long replaceZeroWithOnes(long long n){
    if (n == 0){
        return 1;
    }
    int sign = 1;
    if (n < 0){
        sign = -1;
        n = -n;
    }
    char str_num[20];
    sprintf(str_num, "%lld", n);
    for (int i = 0; i < strlen(str_num); i++){
        if (str_num[i] == '0'){
            str_num[i] = '1';
        }
    }
    long long result = atoll(str_num);
    return result * sign;
}
int main(){
    long long n;
    scanf("%lld\n", replaceZeroWithOnes(n));
    return 0;
}