Created
April 9, 2020 14:04
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Subarray sum equals k in python
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| presum = {0:1} | |
| cumsum, res = 0,0 | |
| for x in nums: | |
| cumsum += x | |
| if cumsum-k in presum: | |
| res += presum[cumsum-k] | |
| if cumsum in presum: | |
| presum[cumsum]+=1 | |
| else: | |
| presum[cumsum]=1 | |
| print(res) |
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