Update PathSum.swift

erlangzhang · Mar 6, 2020 · e713133 · e713133
1 parent 3ac8b91
commit e713133
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Tree/PathSum.swift b/Tree/PathSum.swift
@@ -17,7 +17,7 @@
  */
 
 class PathSum {
-    func hasPathSum(root: TreeNode?, _ sum: Int) -> Bool {
+    func hasPathSum(_ root: TreeNode?, _ sum: Int) -> Bool {
         guard let root = root else {
             return false
         }
@@ -27,4 +27,4 @@ class PathSum {
 
         return hasPathSum(root.left, sum - root.val) || hasPathSum(root.right, sum - root.val)
     }
-}
+}