代码随想录算法训练营第三十三天|860. 柠檬水找零

860. 柠檬水找零

public static boolean lemonadeChange(int[] bills) {
    if (bills.length == 0) {
        return true;
    }
    if (bills[0] > 5) {
        return false;
    }

    int fiveNum = 0;
    int tenNum = 0;

    for (int i = 0; i < bills.length; i++) {
        if (bills[i] == 5) {
            fiveNum++;
            continue;
        }
        if (bills[i] == 20) {
            if (fiveNum == 0) {
                return false;
            }
            if (tenNum == 0) {
                if (fiveNum < 3) {
                    return false;
                } else {
                    fiveNum = fiveNum - 3;
                }
            } else {
                tenNum--;
                fiveNum--;
            }


        }
        if (bills[i] == 10) {
            tenNum++;
            if (fiveNum == 0) {
                return false;
            }
            fiveNum--;
            continue;
        }


    }
    return true;

}