Leetcode 933: number of Recent Calls

#include <iostream>
#include<vector>


class RecentCounter
{
private:
    std::vector<int>count;

public:
    RecentCounter()
    {

    }
    int ping (int t)
    {
        int recent = 0;
        count.push_back(t);

        for(size_t i = 0; i < count.size();  i++ )
        {
            if(t-count[i] <= 3000)
            {
                recent++;
            }
        }
        count.erase(count.begin(), count.end()-recent);

        return recent;

    }
};

int main()
{

}