fix: correct treap split() to match docstring for equal values (#7854)

The split() function in treap.py uses `<` comparison but the docstring states that the right subtree should contain values "greater or equal" to the split value. This fix changes `elif value < root.value:` to `elif value <= root.value:` so that equal values go to the right subtree as documented.

Fixes #7854

Author: maitriupadhyay03-cell

data_structures/binary_tree/treap.py

@@ -5,7 +5,7 @@
 
 class Node:
     """
-    Treap's node
+    Treap's nodeh
     Treap is a binary tree by value and heap by priority
     """
 
@@ -41,7 +41,7 @@ def split(root: Node | None, value: int) -> tuple[Node | None, Node | None]:
     """
     if root is None or root.value is None:  # None tree is split into 2 Nones
         return None, None
-    elif value < root.value:
+    elif value <= root.value:
         """
         Right tree's root will be current node.
         Now we split(with the same value) current node's left son