add jump game ii

Author: tg123

jump-game-ii/README.md

@@ -1,4 +1,10 @@
+## [Prim's algorithm](http://en.wikipedia.org/wiki/Prim's_algorithm)
 
-## TODO 
-  * write down thinking
+This solution looks like [Prim's algorithm](http://en.wikipedia.org/wiki/Prim's_algorithm).
+
+
+ * jump to the furthest reachable point
+ * update `maxjump` like [Jump Game](../jump-game)
+ * `count = count + 1`
+ * loop until reach the end