Leetcode: Longest Common Prefix
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Write a function to find the longest common prefix string amongst an array of strings.
public class Solution { public String longestCommonPrefix(String[] strs) { if (strs == null) { return null; } if (strs.length == 0) { return ""; } String res = strs[0]; for (int i = 1; i < strs.length; i++) { String curr = strs[i]; StringBuilder sb = new StringBuilder(); int j = 0; while (j < res.length() && j < curr.length() && res.charAt(j) == curr.charAt(j)) { sb.append(res.charAt(j)); j++; } res = sb.toString(); } return res; }} 0 0
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