edit 67

Author: fishercoder1534

README.md

@@ -379,7 +379,7 @@ Your ideas/fixes/algorithms are more than welcome!
 |70|[Climbing Stairs](https://leetcode.com/problems/climbing-stairs/)|[Solution](../master/src/main/java/com/stevesun/solutions/ClimbingStairs.java)|O(n)|O(n)|Easy| DP
 |69|[Sqrt(x)](https://leetcode.com/problems/sqrtx/)|[Solution](../master/src/main/java/com/stevesun/solutions/Sqrt.java)|O(logn)|O(1)|Easy|
 |68|[Text Justification](https://leetcode.com/problems/text-justification/)|[Solution](../master/src/main/java/com/stevesun/solutions/TextJustification.java)|O(n)|O(1)|Hard|
-|67|[Add Binary](https://leetcode.com/problems/add-binary/)|[Solution](../master/src/main/java/com/stevesun/solutions/AddBinary.java)|O(n)|O(1)|Easy|
+|67|[Add Binary](https://leetcode.com/problems/add-binary/)|[Solution](../master/src/main/java/com/stevesun/solutions/_67.java)|O(n)|O(1)|Easy|
 |66|[Plus One](https://leetcode.com/problems/plus-one/)|[Solution](../master/src/main/java/com/stevesun/solutions/PlusOne.java)|O(n)|O(1)|Easy|
 |65|[Valid Number](https://leetcode.com/problems/valid-number/)|[Solution](../master/src/main/java/com/stevesun/solutions/_65.java)|O(n)|O(1)|Hard|
 |64|[Minimum Path Sum](https://leetcode.com/problems/minimum-path-sum/)|[Solution](../master/src/main/java/com/stevesun/solutions/MinimumPathSum.java)|O(m*n)|O(m*n)|Medium| DP

src/main/java/com/stevesun/solutions/AddBinary.java renamed to src/main/java/com/stevesun/solutions/_67.java

@@ -6,7 +6,7 @@ Given two binary strings, return their sum (also a binary string).
 	a = "11"
 	b = "1"
 	Return "100".*/
-public class AddBinary {
+public class _67 {
     //then I turned to Discuss, this post is concise: https://discuss.leetcode.com/topic/13698/short-ac-solution-in-java-with-explanation
     //Tricks and things learned that could be learned:
     //1. use StringBuilder.reverse() function! Nice!

src/test/java/com/stevesun/AddBinaryTest.java renamed to src/test/java/com/stevesun/_67Test.java

@@ -1,6 +1,6 @@
 package com.stevesun;
 
-import com.stevesun.solutions.AddBinary;
+import com.stevesun.solutions._67;
 
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -10,16 +10,16 @@
 /**
  * Created by stevesun on 1/8/17.
  */
-public class AddBinaryTest {
-    private static AddBinary test;
+public class _67Test {
+    private static _67 test;
     private static String expected;
     private static String actual;
     private static String a;
     private static String b;
 
     @BeforeClass
     public static void setup(){
-        test = new AddBinary();
+        test = new _67();
         expected = new String();
         actual = new String();
         a = new String();