题目描述

代码 

class Solution {
public:
    bool canConstruct(string ransomNote, string magazine) {
        vector<int> table(26,0);
        for(char ch : magazine){
            table[ch-'a']++;
        }
        for(char ch : ransomNote){
            table[ch-'a']--;
            if(table[ch-'a'] < 0)
                return false;
        }
        return true;
    }
};