Leetcode 346 Solution

This article provides solution to leetcode question 346 (moving-average-from-data-stream)
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https://leetcode.com/problems/moving-average-from-data-stream

Solution

class MovingAverage {
    deque<int> q;
    int64_t m_sum;
    int m_size;

public:
    /** Initialize your data structure here. */
    MovingAverage(int size) {
        m_size = size;
        m_sum = 0;
    }

    double next(int val) {
        m_sum += val;
        q.push_back(val);

        if (q.size() > m_size)
        {
            m_sum -= q.front();
            q.pop_front();
        }

        return m_sum * 1.0 / q.size();
    }
};

/**
 * Your MovingAverage object will be instantiated and called as such:
 * MovingAverage obj = new MovingAverage(size);
 * double param_1 = obj.next(val);
 */