#include <stdio.h>
#include <stdlib.h>
#include <time.h>

void main() {
	int n = 21;
	int group[21];
	int i = 0;
	int tmp = 0;

	srand(time(NULL));

	for (int i = 0; i < n; i++)
	{
		group[i] = rand() % 20;
		printf("%d ", group[i]);
	}

	printf("\n");

	for (int j = 0; j < n; j++)
	{
		for (int i = 0; i < n; i++)
		{
			if (i + 1 < n && group[i] > group[i + 1]) {
				tmp = group[i + 1];
				group[i + 1] = group[i];
				group[i] = tmp;
			}
		}
	}

	for (int i = 0; i < n; i++)
	{
		printf("%d ", group[i]);
	}

	printf("\n");

	for (int i = 0; i < n / 2; i++)
	{
		tmp = group[i];
		group[i] = group[n - i - 1];
		group[n - i - 1] = tmp;
	}

	for (int i = 0; i < n; i++)
	{
		printf("%d ", group[i]);
	}

	getchar();
}