add README.md

Author: ZLBer

Diff for: README.md

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+
+# Leetcode weekly 
+
+Record leetcode contest and ideas every week, and encourage yourself to think more
+
+
+
+* 🏄🏻 [weekly contest 300](src/main/java/weekly/wk300.java) 
+
+
+
+

Diff for: src/main/java/weekly/wk300.java

@@ -9,6 +9,8 @@
 
 public class wk300 {
 
+    //ranking: 466 / 6792
+
     //简单题，注意空格和重复字符
     public String decodeMessage(String key, String message) {
         String replace = key.replace(" ", "");