diff --git a/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution1.cpp b/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution1.cpp
index 8436808daadc2..9d91022a2731d 100644
--- a/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution1.cpp	
+++ b/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution1.cpp	
@@ -32,15 +32,15 @@ typedef struct DSU {
 
 class Solution {
 public:
-    int countComponents(vector<int> &nums, int threshold) {
+    int countComponents(vector<int>& nums, int threshold) {
         DSU dsu(threshold);
-        for (auto &num : nums) {
+        for (auto& num : nums) {
             for (int j = num; j <= threshold; j += num) {
                 dsu.unionSet(num, j);
             }
         }
         unordered_set<int> par;
-        for (auto &num : nums) {
+        for (auto& num : nums) {
             if (num > threshold) {
                 par.insert(num);
             } else {
diff --git a/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution2.cpp b/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution2.cpp
index e398b903a990c..95af4408b0a58 100644
--- a/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution2.cpp	
+++ b/solution/3300-3399/3378.Count Connected Components in LCM Graph/Solution2.cpp	
@@ -1,19 +1,19 @@
 class Solution {
 private:
-    void dfs(int node, vector<vector<int>> &adj, vector<bool> &vis) {
+    void dfs(int node, vector<vector<int>>& adj, vector<bool>& vis) {
         if (vis[node]) return;
         vis[node] = true;
-        for (auto &u : adj[node]) {
+        for (auto& u : adj[node]) {
             dfs(u, adj, vis);
         }
     }
 
 public:
-    int countComponents(vector<int> &nums, int threshold) {
+    int countComponents(vector<int>& nums, int threshold) {
         vector<vector<int>> adj(threshold + 1);
         vector<bool> vis(threshold + 1, false);
         int ans = 0;
-        for (auto &num : nums) {
+        for (auto& num : nums) {
             if (num > threshold) {
                 ++ans;
                 continue;
@@ -23,7 +23,7 @@ class Solution {
                 adj[j].push_back(num);
             }
         }
-        for (auto &num : nums) {
+        for (auto& num : nums) {
             if (num <= threshold && !vis[num]) {
                 dfs(num, adj, vis);
                 ++ans;