java 362. Design Hit Counter.java

Posted 2021-05-08

from collections import deque
class HitCounter(object):

    def __init__(self):
        """
        Initialize your data structure here.
        """
        self.q = deque()

    def hit(self, timestamp):
        """
        Record a hit.
        @param timestamp - The current timestamp (in seconds granularity).
        :type timestamp: int
        :rtype: void
        """
        self.q.append(timestamp)
        

    def getHits(self, timestamp):
        """
        Return the number of hits in the past 5 minutes.
        @param timestamp - The current timestamp (in seconds granularity).
        :type timestamp: int
        :rtype: int
        """
        while len(self.q) > 0 and self.q[0] <= timestamp - 5 * 60 : 
            self.q.popleft()
        return len(self.q)


# Your HitCounter object will be instantiated and called as such:
# obj = HitCounter()
# obj.hit(timestamp)
# param_2 = obj.getHits(timestamp)

public class HitCounter {

    /** Initialize your data structure here. */
    Queue<Integer> queue;
    public HitCounter() {
        queue = new LinkedList<Integer>();
    }
    
    /** Record a hit.
        @param timestamp - The current timestamp (in seconds granularity). */
    public void hit(int timestamp) {
        queue.offer(timestamp);
    }
    
    /** Return the number of hits in the past 5 minutes.
        @param timestamp - The current timestamp (in seconds granularity). */
    public int getHits(int timestamp) {
        while(!queue.isEmpty() && timestamp - queue.peek() >= 300) {
            queue.poll();
        }
        return queue.size();
    }
}

/**
 * Your HitCounter object will be instantiated and called as such:
 * HitCounter obj = new HitCounter();
 * obj.hit(timestamp);
 * int param_2 = obj.getHits(timestamp);
 */