class Solution {
    public boolean canConstruct(String ransomNote, String magazine) {
        HashMap<Character, Integer> hashMap = new HashMap<Character, Integer>();

        for (int i = 0; i < magazine.length(); i++) {
            char c = magazine.charAt(i);
            if (hashMap.containsKey(c)) {
                hashMap.put(c, hashMap.get(c) + 1);
            }
            else {
                hashMap.put(c, 1);
            }
        }

        for (int i = 0; i < ransomNote.length(); i++) {
            char c = ransomNote.charAt(i);
            if (!hashMap.containsKey(c)) {
                return false;
            }
            else {
                int newCount = hashMap.get(c) - 1;
                if (newCount < 0) {
                    return false;
                }
                hashMap.put(c, newCount);
            }
        }
        
        return true;
    }
}