update

1 files changed, 1 insertions, 1 deletions

diff --git a/Data Structures/union-find_disjoint_set.cpp b/Data Structures/union-find_disjoint_set.cpp
index d81a734..b47139f 100644
--- a/Data Structures/union-find_disjoint_set.cpp
+++ b/Data Structures/union-find_disjoint_set.cpp
@@ -9,8 +9,8 @@ public:
 	int find_set(int i) { return (p[i] == i) ? i : (p[i] = find_set(p[i])); }
 	bool same_set(int i, int j) { return find_set(i) == find_set(j); }
 	void union_set(int i, int j) {
-		if (same_set(i, j)) return;
 		int x = find_set(i), y = find_set(j);
+		if (x == y) return;
 		rank[x] > rank[y] ? p[y] = x : p[x] = y;
 		if (rank[x] == rank[y]) rank[y]++;
  	}