#include <stdio.h>

#define OK 0
#define ERROR_INPUT 1
#define CORRECT_ELEM 1
#define MAX_SIZE 10
#define MIN_SIZE 1
#define NO_NEW_NUMBERS 2

int check_number(int n)
{
    int last = n % 10;
    while (n > 9)
        n /= 10;
    if (n == last)
        return 1;
    return 0;
}

void print_arr(int arr[], int size)
{
    for (int i = 0; i < size; i++)
        printf("%d ", arr[i]);
}

int arr_input(int arr[], int size, int new_arr[], int *pointer_new_size)
{
    int new_el = 0;
    int res = 0;
    puts("Enter arr: ");
    for (int i = 0; i < size; i++)
    {
        new_el += scanf("%d", &arr[i]);
        res = check_number(arr[i]);
        if (res)
        {
            new_arr[*pointer_new_size] = arr[i];
            *pointer_new_size += 1;
        }
    }
    if (new_el != size)
        return ERROR_INPUT;

    print_arr(new_arr, *pointer_new_size);

    return OK;
}

int main()
{
    int arr_size = 0;

    int new_size = 0;
    int *pointer_new_size = &new_size;

    int arr[MAX_SIZE] = { 0 };
    int new_arr[MAX_SIZE] = { 0 };

    puts("Enter arr size: ");
    int check_input = scanf("%d", &arr_size);
    if (check_input != CORRECT_ELEM || arr_size > MAX_SIZE || arr_size < MIN_SIZE)
        return ERROR_INPUT;

    check_input = arr_input(arr, arr_size, new_arr, pointer_new_size);
    if (check_input)
        return ERROR_INPUT;

    if (new_size == 0)
        return NO_NEW_NUMBERS;

    return OK;
}