update readme

Liangmp · Liangmp · commit d8e45f90afa8 · 2019-06-11T17:08:02.000+08:00
diff --git a/README.md b/README.md
@@ -20,11 +20,8 @@ Keep updating.
 - Kaprekars Constant 
 - Chessboard Traveling
 - MaximalSquare
-I think this one is very hard when it comes to matrix and filter, and how to handle filter movement within a matrix by pure code without using some matrix handling library.
-Since coderbyte uses python2, and my own laptop uses python3, I have 2 version of the code. 
-For python2 version, you can just copy and paste the code on to the [coderbyte online editor](https://www.coderbyte.com/information/Maximal%20Square) and test the code.
-For python3, you can run it on your own computer. You need to copy and paste the test case on strArr, for example:
-'''
-strArr = ["0111", "1111", "1111", "1111"]
-'''
-Have fun!
+  - I think this one is very hard when it comes to matrix and filter, and how to handle filter movement within a matrix by pure code without using some matrix handling library.
+  - Since coderbyte uses python2, and my own laptop uses python3, I have 2 version of the code. 
+  - For python2 version, you can just copy and paste the code on to the [coderbyte online editor](https://www.coderbyte.com/information/Maximal%20Square) and test the code.
+  - For python3, you can run it on your own computer. You need to copy and paste the test case on strArr, for example: `strArr = ["0111", "1111", "1111", "1111"]`
+  - Have fun!
