[LintCode] 最长单词

class Solution {
public:
    /**
     * @param dictionary: a vector of strings
     * @return: a vector of strings
     */
    vector<string> longestWords(vector<string> &dictionary) {
        // write your code here
        vector<string> res;
        int len = 0;
        for (int i = 0; i < (int)dictionary.size(); i++) {
            if (dictionary[i].length()>= len) {
                if (dictionary[i].length() > len) {
                    res.clear();
                    len = dictionary[i].length();
                }
                res.push_back(dictionary[i]);
            }
        }
        return res;
    }
};