383. 赎金信

383. 赎金信

class Solution {
public:
    bool canConstruct(string ransomNote, string magazine) {
        int map[26]{ 0 };
        for(auto ch : magazine)
            ++map[ch - 'a'];
        for(auto ch : ransomNote)
            --map[ch - 'a'];
        for(int i = 0; i < 26; ++i)
            if(map[i] < 0)
                return false;
        return true;
    }
};