update readme file

Author: Cocoolanu

README.md

@@ -1,3 +1,11 @@
 # Problem-Solving-with-Algorithms-and-Data-Structures-Using-Python
 The folder to record all codings from book "Problem Solving with Algorithms and Data structures using Python"
-Python journey 
+
+Content:
+1. Introduction
+2. Analysis
+3. Basic Data Structures
+4. Recursion
+5. Sorting and Searching
+6. Trees and Tree Algorithms
+7. Graphs and Graph Algorithms