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LeetCode solutions

3207. Make Three Strings Equal

My accepted Python solution to LeetCode problem 3207, Make Three Strings Equal, running in 3ms.

  • Difficulty: Easy
  • Python
  • Runtime 3ms
  • 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 3ms, memory 17.5MB, accepted 2025-12-29.

python
class Solution:
    def findMinimumOperations(self, s1: str, s2: str, s3: str) -> int:
        min_len = min(len(s1), len(s2), len(s3))
        prefix_len = 0
        for i in range(min_len):
            if s1[i] == s2[i] == s3[i]:
                prefix_len += 1
            else:
                break
        if prefix_len == 0:
            return -1
        return (len(s1) - prefix_len) + (len(s2) - prefix_len) + (len(s3) - prefix_len)

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