原题链接

解题思路：主要保留PING中比3000大的

class RecentCounter {
public:RecentCounter() {}int ping(int t) {time.push(t);while(time.front()<t-3000){  //查询T是否比3000大time.pop(); //T比3000小就出队}return time.size();}queue<int> time;
};/*** Your RecentCounter object will be instantiated and called as such:* RecentCounter* obj = new RecentCounter();* int param_1 = obj->ping(t);*/