#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    printf("Invalid input");
    return 0;
}
    int arr[n];
    int i, odd_found = 0;
    for(i = 0; i < n; i++){
        scanf("%d", &arr[i]);
        if(arr[i] % 2 != 0){
            odd_found = 1;
        }
    }
    if(!odd_found){
        printf("Invalid input");
        return 0;
    }
    for(i = 0; i < n; i++){
        if(arr[i] % 2 != 0)
        arr[i] = 1;
    }
    for(i = 0; i < n; i++){
        printf("%d", arr[i]);
    }
    return 0;
}