From 2231fb0cccf9bf84543b19421c973de675b84ecb Mon Sep 17 00:00:00 2001
From: KAMS <amisolkim@gmail.com>
Date: Sat, 22 Nov 2025 20:58:02 +0900
Subject: [PATCH 1/2] containsDuplicate solution

---
 contains-duplicate/Sol35229.java | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 contains-duplicate/Sol35229.java

diff --git a/contains-duplicate/Sol35229.java b/contains-duplicate/Sol35229.java
new file mode 100644
index 0000000000..72d6288a27
--- /dev/null
+++ b/contains-duplicate/Sol35229.java
@@ -0,0 +1,27 @@
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+public class Sol35229 {
+
+    public boolean containsDuplicate(int[] nums) {
+        Set<Integer> duplicateCheck = new HashSet<>();
+        for (int i = 0; i < nums.length; i++) {
+            if (duplicateCheck.contains(nums[i])) {
+                return true;
+            }
+            duplicateCheck.add(nums[i]);
+        }
+        return duplicateCheck.size() != nums.length;
+    }
+
+    public boolean containsDuplicate2(int[] nums) {
+        Arrays.sort(nums);
+        for (int i = 0; i < nums.length-1; i++) {
+            if (nums[i] == nums[i+1]) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

From af4c796b9f875fe3a5cede4214cd980258ffd013 Mon Sep 17 00:00:00 2001
From: KAMS <amisolkim@gmail.com>
Date: Sat, 22 Nov 2025 20:58:19 +0900
Subject: [PATCH 2/2] containsDuplicate solution

---
 contains-duplicate/Sol35229.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/contains-duplicate/Sol35229.java b/contains-duplicate/Sol35229.java
index 72d6288a27..9e54e80fdf 100644
--- a/contains-duplicate/Sol35229.java
+++ b/contains-duplicate/Sol35229.java
@@ -24,4 +24,5 @@ public boolean containsDuplicate2(int[] nums) {
         }
         return false;
     }
+
 }