Merge pull request #199 from honeycoder96/patch-1

Create cyclesort.py
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Harshil 2017-10-31 10:43:35 +05:30 committed by GitHub
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# Code contributed by Honey Sharma
def cycle_sort(array):
ans = 0
# Pass through the array to find cycles to rotate.
for cycleStart in range(0, len(array) - 1):
item = array[cycleStart]
# finding the position for putting the item.
pos = cycleStart
for i in range(cycleStart + 1, len(array)):
if array[i] < item:
pos += 1
# If the item is already present-not a cycle.
if pos == cycleStart:
continue
# Otherwise, put the item there or right after any duplicates.
while item == array[pos]:
pos += 1
array[pos], item = item, array[pos]
ans += 1
# Rotate the rest of the cycle.
while pos != cycleStart:
# Find where to put the item.
pos = cycleStart
for i in range(cycleStart + 1, len(array)):
if array[i] < item:
pos += 1
# Put the item there or right after any duplicates.
while item == array[pos]:
pos += 1
array[pos], item = item, array[pos]
ans += 1
return ans
# Main Code starts here
user_input = input('Enter numbers separated by a comma:\n')
unsorted = [int(item) for item in user_input.split(',')]
n = len(unsorted)
cycle_sort(unsorted)
print("After sort : ")
for i in range(0, n):
print(unsorted[i], end=' ')