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LeetCode solutions

2528. Number of Valid Clock Times

My accepted Python solution to LeetCode problem 2528, Number of Valid Clock Times, running in 67ms.

  • Difficulty: Easy
  • Python
  • Runtime 67ms
  • Memory 17.1MB

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 67ms, memory 17.1MB, accepted 2026-01-01.

python
class Solution:
    def countTime(self, time: str) -> int:
        count = 0
        for h in range(24):
            for m in range(60):
                t = f"{h:02d}:{m:02d}"
                if all(t[i] == time[i] or time[i] == '?' for i in range(5)):
                    count += 1
        return count

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