mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-27 23:11:09 +00:00
51 lines
1.3 KiB
Python
51 lines
1.3 KiB
Python
'''
|
|
This is an implementation of Pigeon Hole Sort.
|
|
'''
|
|
|
|
from __future__ import print_function
|
|
|
|
def pigeon_sort(array):
|
|
# Manually finds the minimum and maximum of the array.
|
|
min = array[0]
|
|
max = array[0]
|
|
|
|
for i in range(len(array)):
|
|
if(array[i] < min): min = array[i]
|
|
elif(array[i] > max): max = array[i]
|
|
|
|
# Compute the variables
|
|
holes_range = max-min + 1
|
|
holes = [0 for _ in range(holes_range)]
|
|
holes_repeat = [0 for _ in range(holes_range)]
|
|
|
|
# Make the sorting.
|
|
for i in range(len(array)):
|
|
index = array[i] - min
|
|
if(holes[index] != array[i]):
|
|
holes[index] = array[i]
|
|
holes_repeat[index] += 1
|
|
else: holes_repeat[index] += 1
|
|
|
|
# Makes the array back by replacing the numbers.
|
|
index = 0
|
|
for i in range(holes_range):
|
|
while(holes_repeat[i] > 0):
|
|
array[index] = holes[i]
|
|
index += 1
|
|
holes_repeat[i] -= 1
|
|
|
|
# Returns the sorted array.
|
|
return array
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
raw_input # Python2
|
|
except NameError:
|
|
raw_input = input # Python 3
|
|
|
|
user_input = raw_input('Enter numbers separated by comma:\n')
|
|
unsorted = [int(x) for x in user_input.split(',')]
|
|
sorted = pigeon_sort(unsorted)
|
|
|
|
print(sorted)
|