#include <stdio.h>
#include <stdlib.h>
int main() {
    int n;
    scanf("%d", &n);
    if (n < 0) {
        printf("Invalid input\n");
        return 0;
    }
    // Dynamically allocate memory for n integers
    int arr = (int)malloc(n*sizeof(int));
    // Read elements into dynamically allocated array
    for (int i = 0; i < n; i++) {
        if (scanf("%d", arr + i) != 1) {  // input validation
            printf("Invalid input\n");
            free(arr);
            return 0;
        }
    }
    // Print original array
    for (int i = 0; i < n; i++) {
        printf("%d ", *(arr + i));
    }
    printf("\n");
    // Reverse array in place using pointers
    int *start = arr;
    int *end = arr + n - 1;
    while (start < end) {
        int temp = *start;
        *start = *end;
        *end = temp;
        start++;
        end--;
    }
    // Print reversed array
    for (int i = 0; i < n; i++) {
        printf("%d ", *(arr + i));
    }
    printf("\n");

    free(arr);  // free allocated memory
    return 0;
}