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Deven
2023-01-17 23:51:13 -05:00
parent 536c456bb6
commit 8e78f828ef
1 changed files with 19 additions and 1 deletions
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1512-number-of-good-pairs/1512-number-of-good-pairs.py
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@@ -2,9 +2,27 @@ class Solution:
def numIdenticalPairs(self, nums: List[int]) -> int: def numIdenticalPairs(self, nums: List[int]) -> int:
count = 0 count = 0
while len(nums) > 0:
oldLength = len(nums)
# Removes all instances of nums[0]
nums = [ n for n in nums if n != nums[0] ]
numOccurances = oldLength - len(nums)
if numOccurances > 1:
count += int((numOccurances * (numOccurances - 1)) / 2) # numOccurances choose 2
return count
"""
## Straight-forward solution
count = 0
for i in range(len(nums)): for i in range(len(nums)):
for j in range(i + 1, len(nums)): for j in range(i + 1, len(nums)):
if nums[i] == nums[j]: if nums[i] == nums[j]:
count += 1 count += 1
return count return count
"""