Below is my code and it performs pretty well...(Beats 98%) However I am a beginner in asymptotic analysis and I don't think it's an O(n) solution, especially when the input array is sorted in descending order. I think it's O(n*k). Am I wrong?

'''

```
public int[] maxSlidingWindow(int[] nums, int k) {
if(nums.length == 0)
return new int[0];
int[] res = new int[nums.length - k + 1];
int max = Integer.MIN_VALUE;
for(int i = 0; i < k; i++){
if(nums[i] > max){
max = nums[i];
}
}
for(int i = k; i < nums.length; i++){
res[i - k] = max;
if(nums[i] >= max){
max = nums[i];
}
else if(nums[i - k] == max){
max = Integer.MIN_VALUE;
for(int j = i - k + 1; j <= i; j++){
if(nums[j] >= max){
max = nums[j];
}
}
}
}
res[res.length - 1] = max;
return res;
}
```

'''