15 Dec 14. Longest Common Prefix
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 "".
Example 1:
Input: strs = ["flower","flow","flight"] Output: "fl"
Example 2:
Input: strs = ["dog","racecar","car"] Output: "" Explanation: There is no common prefix among the input strings.
Constraints:
1 <= strs.length <= 2000 <= strs[i].length <= 200strs[i]consists of only lowercase English letters.
class Solution:
def longestCommonPrefix(self, strs: List[str]) -> str:
if len(strs) == 0:
return ”
comment = strs[0]
for str in strs:
print(str)
while not str.startswith(comment):
comment = comment[:-1]
print(comment)
print(“—————“)
return comment
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