From 5d02103b273dffb2637264c0fc2136ca4fd41b57 Mon Sep 17 00:00:00 2001
From: Jogendra Singh <58473917+Joe-Sin7h@users.noreply.github.com>
Date: Fri, 24 Sep 2021 16:24:38 +0530
Subject: [PATCH] Fixed #4764 (#4779)

* Fixed #4764

* Fixes #4764
---
 data_structures/disjoint_set/disjoint_set.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/data_structures/disjoint_set/disjoint_set.py b/data_structures/disjoint_set/disjoint_set.py
index a93b89621..bf5ab415d 100644
--- a/data_structures/disjoint_set/disjoint_set.py
+++ b/data_structures/disjoint_set/disjoint_set.py
@@ -26,7 +26,10 @@ def union_set(x, y):
     disjoint set tree will be more flat.
     """
     x, y = find_set(x), find_set(y)
-    if x.rank > y.rank:
+    if x == y:
+        return
+
+    elif x.rank > y.rank:
         y.parent = x
     else:
         x.parent = y