refactor 339

fishercoder1534 · fishercoder1534 · commit 027089200249 · 2019-01-11T08:03:58.000-08:00
diff --git a/src/main/java/com/fishercoder/solutions/_339.java b/src/main/java/com/fishercoder/solutions/_339.java
@@ -5,37 +5,36 @@
 import java.util.List;
 
 public class _339 {
-    class SolutionWithGlobalSum {
-        private int sum = 0;
+  public static class Solution1 {
+    private int sum = 0;
 
-        public int depthSum(List<NestedInteger> nestedList) {
-            return dfs(nestedList, 1);
-        }
-
-        private int dfs(List<NestedInteger> nestedList, int depth) {
-            for (NestedInteger ni : nestedList) {
-                if (ni.isInteger()) {
-                    sum += depth * ni.getInteger();
-                } else {
-                    dfs(ni.getList(), depth + 1);
-                }
-            }
-            return sum;
-        }
+    public int depthSum(List<NestedInteger> nestedList) {
+      return dfs(nestedList, 1);
     }
 
-    class SolutionWithLocalSum {
-        public int depthSum(List<NestedInteger> nestedList) {
-            return dfs(nestedList, 1);
+    private int dfs(List<NestedInteger> nestedList, int depth) {
+      for (NestedInteger ni : nestedList) {
+        if (ni.isInteger()) {
+          sum += depth * ni.getInteger();
+        } else {
+          dfs(ni.getList(), depth + 1);
         }
+      }
+      return sum;
+    }
+  }
 
-        private int dfs(List<NestedInteger> nestedList, int depth) {
-            int sum = 0;
-            for (NestedInteger ni : nestedList) {
-                sum += ni.isInteger() ? depth * ni.getInteger() : dfs(ni.getList(), depth + 1);
-            }
-            return sum;
-        }
+  public static class Solution2 {
+    public int depthSum(List<NestedInteger> nestedList) {
+      return dfs(nestedList, 1);
     }
 
-}
+    private int dfs(List<NestedInteger> nestedList, int depth) {
+      int sum = 0;
+      for (NestedInteger ni : nestedList) {
+        sum += ni.isInteger() ? depth * ni.getInteger() : dfs(ni.getList(), depth + 1);
+      }
+      return sum;
+    }
+  }
+}
