14. 最长公共前缀

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class Solution {
    public String longestCommonPrefix(String[] strs) {
        if (strs.length == 0) return "";
       
        if (strs.length == 1) return strs[0];

        String result = strs[0];

        for (int i = 0; i < strs.length; i++) {

            if (!strs[i].startsWith(result)) {
                // 对 result 进行裁剪
                result = result.substring(0, result.length() - 1);
                i--;
            }
        }

        return result;
    }
}