Create 124-Binary-Tree-Maximum-Path-Sum.cs

sarangbg · Sep 12, 2022 · 8fd556a · 8fd556a
1 parent fd08e46
commit 8fd556a
Showing 1 changed file with 25 additions and 0 deletions.
diff --git a/csharp/124-Binary-Tree-Maximum-Path-Sum.cs b/csharp/124-Binary-Tree-Maximum-Path-Sum.cs
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+public class Solution {
+
+int maxPathSum = Int32.MinValue;
+
+ public int MaxPathSum(TreeNode root)
+ {
+ DfsMaxPathSum(root);
+ return maxPathSum;
+ }
+
+ private int DfsMaxPathSum(TreeNode root)
+ {
+ if (root == null)
+ return 0;
+
+ int leftMax = DfsMaxPathSum(root.left),
+ rightMax = DfsMaxPathSum(root.right),
+ currentMax = 0;
+
+ currentMax = Math.Max(currentMax, Math.Max(leftMax + root.val, rightMax + root.val));
+ maxPathSum = Math.Max(maxPathSum, leftMax + root.val + rightMax);
+
+ return currentMax;
+ }
+}