diff --git a/reference/set/set/count.md b/reference/set/set/count.md
index a9aae4791..69e0cc700 100644
--- a/reference/set/set/count.md
+++ b/reference/set/set/count.md
@@ -67,8 +67,8 @@ int main()
 
 ### 出力
 ```
-2
-2
+1
+1
 ```
 
 ## 関連項目
diff --git a/reference/set/set/lower_bound.md b/reference/set/set/lower_bound.md
index b02867c4a..6c5bc0c92 100644
--- a/reference/set/set/lower_bound.md
+++ b/reference/set/set/lower_bound.md
@@ -87,11 +87,9 @@ int main()
 ### 出力
 ```
 B
-B
 C
 D
 
-B
 B
 C
 D
diff --git a/reference/set/set/upper_bound.md b/reference/set/set/upper_bound.md
index 5e2feb56b..6e4dad3e0 100644
--- a/reference/set/set/upper_bound.md
+++ b/reference/set/set/upper_bound.md
@@ -87,11 +87,9 @@ int main()
 ### 出力
 ```
 B
-B
 C
 D
 
-B
 B
 C
 D