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LeetCode solutions

1510. Find Lucky Integer in an Array

My accepted Python solution to LeetCode problem 1510, Find Lucky Integer in an Array, running in 4ms.

  • Difficulty: Easy
  • Python
  • Runtime 4ms
  • Memory 17.5MB

Read the problem on LeetCode View on GitHub

The problem statement is LeetCode’s and stays on their site. What follows is my accepted solution.

Python

Accepted on LeetCode — runtime 4ms, memory 17.5MB, accepted 2025-12-30.

python
class Solution:
    def findLucky(self, arr: List[int]) -> int:
        from collections import Counter
        count = Counter(arr)
        lucky = [num for num, freq in count.items() if num == freq]
        return max(lucky) if lucky else -1

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