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Diffstat (limited to 'challenge-249/packy-anderson/python/ch-1.py')
| -rwxr-xr-x | challenge-249/packy-anderson/python/ch-1.py | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/challenge-249/packy-anderson/python/ch-1.py b/challenge-249/packy-anderson/python/ch-1.py new file mode 100755 index 0000000000..228bb47da3 --- /dev/null +++ b/challenge-249/packy-anderson/python/ch-1.py @@ -0,0 +1,47 @@ +#!/usr/bin/env python + +from collections import Counter + +def equalPairs(nums): + pairs = [] + num_count = Counter() + # count how many of each int we have + for num in nums: + num_count[num] += 1 + + # first, make sure we have even numbers of each integer + for k, v in dict(num_count).items(): + if v % 2 == 0: # it's even, we can make pairs + continue + else: + return pairs # we have an odd number, no pairs + + # now make pairs from those integers + for k, v in dict(num_count).items(): + count = v # the values k, v are read-only + while count > 0: + pairs.append( [k, k] ) + count -= 2 + + return pairs + +def comma_join(arr): + return ', '.join(map(lambda i: str(i), arr)) + +def solution(nums): + print(f'Input: @ints = ({comma_join(nums)})') + pairs = equalPairs(nums) + if len(pairs) == 0: + print('Output: ()') + else: + pairs = [ f'({x[0]}, {x[1]})' for x in pairs ] + print(f"Output: { ', '.join(pairs) }") + +print('Example 1:') +solution([3, 2, 3, 2, 2, 2]) + +print('\nExample 2:') +solution([1, 2, 3, 4]) + +print('\nExample 3:') +solution([1, 2, 3, 4, 4, 3, 2, 1])
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