2020/08/17/README.md


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You are given a list of numbers, and a target number k.
Return whether or not there are two numbers in the list that add up to k.

Example:
Given [4, 7, 1 , -3, 2] and k = 5,
return true since 4 + 1 = 5.

def two_sum(list, k):
  # Fill this in.

print two_sum([4,7,1,-3,2], 5)
# True

Try to do it in a single pass of the list.