Leetcode 1635 Solution

This article provides solution to leetcode question 1635 (number-of-good-pairs)

https://leetcode.com/problems/number-of-good-pairs

Solution

class Solution: def numIdenticalPairs(self, nums: List[int]) -> int: m = collections.defaultdict(int)
ans = 0 for num in nums: ans += m[num] m[num] += 1
return ans