Created
November 6, 2017 01:57
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MergeSortPython
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def merge_sort(array): | |
if len(array) <= 1: | |
return array | |
midpoint = int(len(array) / 2) | |
left, right = merge_sort(array[:midpoint]), merge_sort(array[midpoint:]) | |
return merge(left, right) | |
def merge(left, right): | |
result = [] | |
left_pointer = right_pointer = 0 | |
while left_pointer < len(left) and right_pointer < len(right): | |
if left[left_pointer] < right[right_pointer]: | |
result.append(left[left_pointer]) | |
left_pointer += 1 | |
else: | |
result.append(right[right_pointer]) | |
right_pointer += 1 | |
result.extend(left[left_pointer:]) | |
result.extend(right[right_pointer:]) | |
return result | |
def main(): | |
array = [5, 4, 3, 2, 1] | |
print(array) | |
result = merge_sort(array) | |
print(result) | |
if __name__ == "__main__": | |
main() |
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