题解 | #最长公共前缀#

class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param strs string字符串vector 
     * @return string字符串
     */
    string longestCommonPrefix(vector<string>& strs) {
        // write code here
        if (strs.empty()) {
            return "";
        }
        if (strs.size() == 1) {
            return strs[0];
        }
        int i = 0;
        for (; i < strs[0].size(); i++) {
            char tmp = strs[0][i];
            for (int j = 1; j < strs.size(); j++) {
                if (i >= strs[j].size() || strs[j][i] != tmp) {
                    return strs[0].substr(0, i);
                }
            }
        }
        return strs[0].substr(0, i);
    }
};