1189-maximum-number-of-balloons.java

class Solution {
    public int maxNumberOfBalloons(String text) {
        HashMap<Character, Integer> balloon = new HashMap<>();
        HashMap<Character, Integer> countText = new HashMap<>();
        
        char[] balloonArray = "balloon".toCharArray();
        
        for (char c : balloonArray) {
            if (balloon.containsKey(c)) {
                balloon.put(c,balloon.get(c)+1);
            } else {
                balloon.put(c,1);
            }
        }
        
        char[] countTextArray = text.toCharArray();
        
        for (char c : countTextArray) {
            if (countText.containsKey(c)) {
                countText.put(c,countText.get(c)+1);
            } else {
                countText.put(c,1);
            }
        }
        
        int res = text.length();
        for (Character c : balloon.keySet()) {
            res = Math.min(res,countText.getOrDefault(c,0) / balloon.get(c));
        }
    
        return res;
    }
}