diff --git a/Templates/DSU on TREE.cpp b/Templates/DSU on TREE.cpp
index 50271ab..6845b7e 100644
--- a/Templates/DSU on TREE.cpp	
+++ b/Templates/DSU on TREE.cpp	
@@ -51,3 +51,4 @@ void dfs(ll u, ll p, bool keep)
     if(keep == 0)
         add(u, p, -1);
 }
+//szdfs(1,-1); dfs(1,-1,0);