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array-of-products.py
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array-of-products.py
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# ARRAY OF PRODUCTS
# O(N) time and space
def arrayOfProducts(array):
# Write your code here.
# O(N) time, space
left, right = [0] * len(array), [0] * len(array)
left[0] = 1
right[len(array) - 1] = 1
for i in range(1, len(array)):
left[i] = left[i-1] * array[i-1]
for i in reversed(range(len(array) - 1)):
right[i] = right[i+1] * array[i+1]
result = []
for i in range(len(array)):
result.append(left[i] * right[i])
return result
# O(N) time and space
def arrayOfProducts(array):
# Write your code here.
# O(N) time and space
left = [0] * len(array)
left[0] = 1
right = 1
for i in range(1, len(array)):
left[i] = left[i-1] * array[i-1]
result = []
for i in reversed(range(len(array))):
result.insert(0, left[i] * right)
right *= array[i]
return result
# O(N) time and space
def arrayOfProducts(array):
# Write your code here.
result = [1] * len(array)
for i in range(1, len(array)):
result[i] = result[i-1] * array[i-1]
right = 1
for i in reversed(range(len(array))):
result[i] = result[i] * right
right *= array[i]
return result