题目：

题解：

class Solution {
public:bool canConstruct(string ransomNote, string magazine) {if (ransomNote.size() > magazine.size()) {return false;}vector<int> cnt(26);for (auto & c : magazine) {cnt[c - 'a']++;}for (auto & c : ransomNote) {cnt[c - 'a']--;if (cnt[c - 'a'] < 0) {return false;}}return true;}
};