31 lines
594 B
Python
31 lines
594 B
Python
"""
|
|
Analogizing this algorithm with inserting a playing
|
|
card into your hand, we distinguish the "key" as
|
|
the inserting card and find the position of that
|
|
card among the previous j - 1 cards.
|
|
|
|
O(n^2) runtime (the deck is sorted in descending order).
|
|
"""
|
|
|
|
def insertionSort(A):
|
|
N = len(A)
|
|
|
|
for j in range(1, N):
|
|
key = A[j]
|
|
#insert the key into the sorted sequence A[1, ... , j - 1]
|
|
i = j - 1
|
|
while i >= 0 and A[i] > key:
|
|
A[i + 1] = A[i]
|
|
i -= 1
|
|
|
|
A[i + 1] = key
|
|
|
|
|
|
A = [12, 3, 7, 22, -12, 100, 1]
|
|
insertionSort(A)
|
|
|
|
print("Sorted array: ")
|
|
for ele in A:
|
|
print("\t" + str(ele))
|
|
|