Updated changelog, added module-level docstrings

Author: shorodilov

CHANGELOG.rst

@@ -1,3 +1,30 @@
+###############
+Release 2023-01
+###############
+
+***********************
+Basic Python Challenges
+***********************
+
+Recursive Algorithms
+====================
+
+Added factorial and fibonacci number calculation functions.
+
+Dynamic Programming
+===================
+
+Implemented the most common challenges (and solutions):
+
+- fibonacci number getter function
+- grid travel challenge
+- target number against sequences of numbers checkers (can get, generate chunk)
+
+Binary Search
+=============
+
+Added binary search algorithm challenge: find strings starting with prefix.
+
 ###############
 Release 2022-11
 ###############

src/bisearch/prefix.py

@@ -1,3 +1,14 @@
+"""
+Prefix challenge
+================
+
+The objective is to get all strings, that start with a specified prefixes,
+from the sorted collection.
+
+The most efficient way is to use binary search algorithm for this task.
+
+"""
+
 from typing import List