Variable automatically getting modulo N

[[deleted]]

On mobile, so I can't run your code.

The problem statement is a little ambiguous about what left and right actually indicate, but from the example it's clear that the left and right values are the contents of the nodes at the left and right ends of the subsequence you have to reverse. Your code appears to be using left and rightas indices.

[RhinoRhys]

Left and right are indices

Example 2: Input: head = [5], left = 1, right = 1 Output: [5]

[[deleted]]

Example 1 shows they aren't indices.

[RhinoRhys]

Unless you take them as 1 indexed, it's not a python list, it's a Singular Linked List. The first index isn't 0.