vector<int> maxSlidingWindow(vector<int>& nums, int k) {
MaxQueue mq;
vector<int > ans;
if(nums.size() == 0 || k <= 0) return ans;
for(int i = 0; i < nums.size(); ++i){
if(i+1 >= k){
ans.push_back(mq.getMax());
mq.pop();
}
mq.push(nums[i]);
}
return ans;
}
