933. Number of Recent Calls
Explanation:
- We can use a queue to keep track of the requests within the time frame of 3000 milliseconds.
- When a new request comes in, we remove all requests outside the time frame from the front of the queue.
- We add the new request to the back of the queue and return the size of the queue, which represents the number of requests within the time frame. Solution:
class RecentCounter {
Queue<Integer> requests;
public RecentCounter() {
requests = new LinkedList<>();
}
public int ping(int t) {
while (!requests.isEmpty() && requests.peek() < t - 3000) {
requests.poll();
}
requests.offer(t);
return requests.size();
}
}Code Editor (Testing phase)
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