#include <iostream>
using namespace std;

void Print(int* arr, int size) {
    for (int i = 0; i < size; i++) {
        cout << *(arr + i) << " ";
    }
    cout << endl;
}

int main() {
    srand(time(NULL));

    const int size = 10;

    int arr[size];

    for (int i = 0; i < size; i++) {
        *(arr + i) = rand() % 100;
    }
    Print(arr, size);

    for (int i = 0; i < size - 1; i += 2) {
        int temp = *(arr + i);
        *(arr + i) = *(arr + i + 1);
        *(arr + i + 1) = temp;
    }

    Print(arr, size);
}