Product of Array Except Self - Leetcode 238 - Arrays & Strings (Python)
The Python code for this problem can be found at my GitHub repo here: github.com/gahogg/Leetcode-So...
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Пікірлер: 17
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Thanks, I love this solution! It was really easy to follow and I appreciate the concise code. I also never knew the zip() function existed
The way you explain stuff is awesome, keep up the good work and please also upload hard questions too
Literally the only video that helped!!! Thank you
@GregHogg
5 ай бұрын
Glad to hear it 😎
Hi Greg! What is the app you use to draw and teach us? I find it very easy to use and would like to take notes while viewing your videos.
@GregHogg
3 ай бұрын
I use miro! It's really good for drawing:)
@annas8308
3 ай бұрын
@@GregHogg Thank you, Greg!
I think you could get a constant time and space improvement by doing two passes through the array: first construct the product of all elements (unless they're 0), then iterate through again and divide the total by the current element. You do have go handle for 0s as a special case though, which might make it just as complex
@kiattim2100
3 ай бұрын
You can't use division. That's the rule in leetcode 238
@jarodlatta6185
3 ай бұрын
@@kiattim2100 ah okay, that makes sense
Thanks!
@GregHogg
6 ай бұрын
Very welcome :)
bro how do you come up with this logic
@GregHogg
Ай бұрын
Sometimes I might have figured it out, sometimes I might have just learned it elsewhere.
Could you please let me know what you think of this solution? I should mention that there is a problem in the output when we have only one zero in numbers. The second if returns an array with all zeros. import numpy class Solution: def productExceptSelf(self, nums: List[int]) -> List[int]: ans = [] ind = numpy.where(nums == 0)[0] if len(ind) > 1: return [0]*len(ind) if len(ind) == 1: i = ind[0] res = numpy.prod(nums[:i]) * numpy.prod(nums[i+1:]) ans = [0]*len(nums) ans[i] = res return ans product = numpy.prod(nums) ans = [product // num for num in nums] return ans
@rishishah835
Ай бұрын
What's the need to import numpy, the product function? Also, we're not allowed to use division, otherwise we could just iterate once -- get the total product, and then iterate through just dividing by each value in nums (unless 0)