From c99eade07c79951dda4245221f3ecd843a52bf5c Mon Sep 17 00:00:00 2001
From: delight010 <seonga.oh00@gmail.com>
Date: Thu, 18 Sep 2025 14:49:09 +0900
Subject: [PATCH 1/2] solve problem

---
 linked-list-cycle/delight010.swift | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 linked-list-cycle/delight010.swift

diff --git a/linked-list-cycle/delight010.swift b/linked-list-cycle/delight010.swift
new file mode 100644
index 000000000..0deb5622d
--- /dev/null
+++ b/linked-list-cycle/delight010.swift
@@ -0,0 +1,29 @@
+public class ListNode {
+    public var val: Int
+    public var next: ListNode?
+    public init(_ val: Int) {
+        self.val = val
+        self.next = nil
+    }
+}
+
+
+class Solution {
+    // Time O(n)
+    // Space O(1)
+    func hasCycle(_ head: ListNode?) -> Bool {
+        var slow: ListNode? = head
+        var fast: ListNode? = head
+        
+        while fast != nil && fast?.next != nil {
+            slow = slow?.next
+            fast = fast?.next?.next
+            
+            if slow === fast {
+                return true
+            }
+        }
+        return false
+    }
+}
+ 

From 7ed933936cdf9428ee73ba812fa538714fef0d9e Mon Sep 17 00:00:00 2001
From: delight010 <seonga.oh00@gmail.com>
Date: Fri, 19 Sep 2025 08:56:37 +0900
Subject: [PATCH 2/2] solve problem

---
 sum-of-two-integers/delight010.swift | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 sum-of-two-integers/delight010.swift

diff --git a/sum-of-two-integers/delight010.swift b/sum-of-two-integers/delight010.swift
new file mode 100644
index 000000000..1e5513f38
--- /dev/null
+++ b/sum-of-two-integers/delight010.swift
@@ -0,0 +1,18 @@
+class Solution {
+    // Time O(log n)
+    // Space O(1)
+    func getSum(_ a: Int, _ b: Int) -> Int {
+        var a = a
+        var b = b
+        
+        while b != 0 {
+            var sum = a ^ b
+            var carry = (a & b) << 1
+            a = sum
+            b = carry
+        }
+        
+        return a
+    }
+}
+