Easy java solution with linked list

  • 0

    Using Java built in LinkedList, to remove the need to keep track of our own array window with index pointer

    class MovingAverage {
        LinkedList<Integer> list;
        int capacity;
        double total;
        /** Initialize your data structure here. */
        public MovingAverage(int size) {
            list = new LinkedList<Integer>();
            capacity = size;
            total = 0;
        public double next(int val) {
            if (list.size() == capacity) total -= list.removeFirst();
            total += val;
            return total / list.size();

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