English
14. Longest Common Prefix
Problem Statement
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 <= 200
0 <= strs[i].length <= 200
strs[i]
consists of only lowercase English letters.
Solution:
java
class Solution {
public String longestCommonPrefix(String[] strs) {
String res = strs[0];
for (int i = 1; i < strs.length; i++)
while (!strs[i].startsWith(res))
res = res.substring(0, res.length() - 1);
return res;
}
}
...