Solution.cpp

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