Vibe Coding Arena

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Longest Common Prefix

easy

Write a function to find the longest common prefix string amongst an array of strings.

If there is no common prefix, return an empty string `""`.

Function Signature

def longest_common_prefix(strs: list[str]) -> str:

Examples

Input: strs = ["flower","flow","flight"]

Output: "fl"

Input: strs = ["dog","racecar","car"]

Output: ""

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Test Results

Test 1

longest_common_prefix(["flower","flow","flight"])

Expected: "fl"

Test 2

longest_common_prefix(["dog","racecar","car"])

Expected: ""

Test 3

longest_common_prefix(["a"])

Expected: "a"

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