I have been trying a lot but exhausted.

Need to find unique values in list without using any inbuilt method or inbuilt-properties.

By default my list will be in sorted format only.

My code :

lst = [1, 2, 2, 3, 4, 4, 5] `
i = 0
while i < len(lst):
    if lst[i] < lst[i+1]:
        print(lst[i])
    else:
        print(lst[i+1])
        i+=1
    i+=1

The above code gives me output only upto 4 --> 1,2,3,4.

How do i need to print my 5.

I need to only use comparison approach to design my code.

left_value < right_value

Help me to correct my above code.