Merge pull request neetcode-gh#921 from vishaldesai516/patch-1

Update 261-Graph-Valid-Tree.java

Author: Ahmad-A0

java/261-Graph-Valid-Tree.java

@@ -18,7 +18,7 @@ public boolean validTree(int n, int[][] edges) {
 
         Set<Integer> visited = new HashSet<>();
 
-        return depthFirstSearch(0, -1, visited) && visited.size() == n;
+        return depthFirstSearch(edges[0][0], -1, visited) && visited.size() == n;
     }
 
     private boolean depthFirstSearch(