void bubble_sort(struct Student *list, int n)
{
	int c, d;
	struct Student t;

	for (c = 0; c < n - 1; c++) {
		for (d = 0; d < n - c - 1; d++) {
			if (list[d].stypendium > list[d + 1].stypendium) {

				t = list[d];
				list[d] = list[d + 1];
				list[d + 1] = t;
			}
		}
	}
}