Day6. Namespace style

2022-10-07 16:36:27 +03:00
parent 62104da8f1
commit 5cae083979
51 changed files with 589 additions and 202 deletions
--- a/Traversal/Solution.cs
+++ b/Traversal/Solution.cs
@@ -0,0 +1,39 @@
+namespace _102._Binary_Tree_Level_Order_Traversal;
+
+public class Solution
+{
+    public IList<IList<int>> LevelOrder(TreeNode root)
+    {
+        List<IList<int>> output = new List<IList<int>>();
+        RecursiveTraversal(output, new List<TreeNode>() { root });
+        return output;
+    }
+
+    private void RecursiveTraversal(List<IList<int>> output, List<TreeNode> curLevel)
+    {
+        if (curLevel.Count == 0)
+            return;
+        List<int> levelValues = new List<int>();
+        foreach (var n in curLevel)
+        {
+            if (n == null)
+                continue;
+            levelValues.Add(n.val);
+        }
+        if (levelValues.Count == 0)
+            return;
+        output.Add(levelValues);
+
+        List<TreeNode> nextLevel = new List<TreeNode>();
+        foreach (var n in curLevel)
+        {
+            if (n == null)
+                continue;
+            if (n.left != null)
+                nextLevel.Add(n.left);
+            if (n.right != null)
+                nextLevel.Add(n.right);
+        }
+        RecursiveTraversal(output, nextLevel);
+    }
+}