leetcode-patterns-java/LeetCode_Problems/Java/easy/0860. Lemonade Change.java at main · elchibek5/leetcode-patterns-java · GitHub

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class Solution {
    public boolean lemonadeChange(int[] bills) {
        int five = 0;
        int ten = 0;

        for (int i = 0; i < bills.length; i++) {
            if (bills[i] == 5) five++;
            else if (bills[i] == 10) {
                if (five > 0) {
                    five--;
                    ten++;
                } else {
                    return false;
                }
            } else {
                if (ten > 0 && five > 0) {
                    ten--;
                    five--;
                } else if (five >= 3) {
                    five -= 3;
                } else {
                    return false;
                }
            }
        }

        return true;
    }
}