From b3e9dfe15770cb07751cb9380aea42077c1aa351 Mon Sep 17 00:00:00 2001
From: ICE0208 <doky3307@naver.com>
Date: Sat, 15 Aug 2026 19:34:41 +0900
Subject: [PATCH 1/3] reverse bits

---
 reverse-bits/ICE0208.java | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 reverse-bits/ICE0208.java

diff --git a/reverse-bits/ICE0208.java b/reverse-bits/ICE0208.java
new file mode 100644
index 0000000000..bc7502fa1a
--- /dev/null
+++ b/reverse-bits/ICE0208.java
@@ -0,0 +1,12 @@
+class Solution {
+    public int reverseBits(int n) {
+        String binary = String.format("%32s", Integer.toBinaryString(n))
+                .replace(' ', '0');
+
+        String reversed = new StringBuilder(binary)
+                .reverse()
+                .toString();
+
+        return Integer.parseUnsignedInt(reversed, 2);
+    }
+}

From 5e96c183e5e494aa16e678539aac4cdd91d19954 Mon Sep 17 00:00:00 2001
From: ICE0208 <doky3307@naver.com>
Date: Sat, 15 Aug 2026 20:05:37 +0900
Subject: [PATCH 2/3] p424

---
 .../ICE0208.java                              | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 longest-repeating-character-replacement/ICE0208.java

diff --git a/longest-repeating-character-replacement/ICE0208.java b/longest-repeating-character-replacement/ICE0208.java
new file mode 100644
index 0000000000..f2539a5aa0
--- /dev/null
+++ b/longest-repeating-character-replacement/ICE0208.java
@@ -0,0 +1,25 @@
+class Solution {
+    public int characterReplacement(String s, int k) {
+        int[] frequency = new int[26];
+        int maxFrequency = 0;
+        int left = 0;
+        int maxLength = 0;
+
+        for (int right = 0; right < s.length(); right++) {
+            int index = s.charAt(right) - 'A';
+            frequency[index]++;
+
+            // maxFrequency 갱신
+            maxFrequency = Math.max(maxFrequency, frequency[index]);
+
+            // right - left + 1 - maxFrequency : 현재 위도우에서 maxFrequency를 제외한 개수
+            while (right - left + 1 - maxFrequency > k) {
+                frequency[s.charAt(left) - 'A']--;
+                left++;
+            }
+
+            maxLength = Math.max(maxLength, right - left + 1);
+        }
+        return maxLength;
+    }
+}

From e30386bee958a9946507d8ca8137c2a76910308a Mon Sep 17 00:00:00 2001
From: ICE0208 <doky3307@naver.com>
Date: Sat, 15 Aug 2026 20:16:09 +0900
Subject: [PATCH 3/3] =?UTF-8?q?reverse-bits=20=EB=B9=84=ED=8A=B8=20?=
 =?UTF-8?q?=EC=A1=B0=EC=9E=91=20=EA=B3=84=EC=82=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 reverse-bits/ICE0208.java | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/reverse-bits/ICE0208.java b/reverse-bits/ICE0208.java
index bc7502fa1a..c23eeda693 100644
--- a/reverse-bits/ICE0208.java
+++ b/reverse-bits/ICE0208.java
@@ -1,3 +1,20 @@
+class Solution2 {
+    public int reverseBits(int n) {
+        int result = 0;
+
+        for (int i = 0; i < 32; i++) {
+            int lastBit = n & 1; // 가장 오른쪽 비트 추출
+
+            result <<= 1;        // 새 비트를 넣을 자리 확보
+            result |= lastBit;   // 추출한 비트를 오른쪽 끝에 추가
+
+            n >>>= 1;            // 처리한 비트를 버림.
+        }
+
+        return result;
+    }
+}
+
 class Solution {
     public int reverseBits(int n) {
         String binary = String.format("%32s", Integer.toBinaryString(n))