383. Ransom Note

class Solution {public:    bool canConstruct(string ransomNote, string magazine) {        int alp[256]={0};        for(int i=0;magazine[i]!='\0';i++)            alp[magazine[i]]++;        for(int i=0;ransomNote[i]!='\0';i++)            if(--alp[ransomNote[i]]<0)return false;        return true;    }};