933.最近的请求次数

class RecentCounter {Queue<Integer> queue = new LinkedList<>();public RecentCounter() {}public int ping(int t) {queue.offer(t);while(t - queue.peek() > 3000){queue.poll();}return queue.size();}
}/*** Your RecentCounter object will be instantiated and called as such:* RecentCounter obj = new RecentCounter();* int param_1 = obj.ping(t);*/