From 0ea6ce851d08abd7f1c5175eb7fc5ba4a8224720 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=A4=80=EC=98=81?= <junzero741@gmail.com>
Date: Tue, 17 Mar 2026 10:19:31 +0900
Subject: [PATCH 1/2] =?UTF-8?q?isPalindrome=20=ED=92=80=EC=9D=B4=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 valid-palindrome/junzero741.ts | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 valid-palindrome/junzero741.ts

diff --git a/valid-palindrome/junzero741.ts b/valid-palindrome/junzero741.ts
new file mode 100644
index 000000000..1f5bf7cbd
--- /dev/null
+++ b/valid-palindrome/junzero741.ts
@@ -0,0 +1,29 @@
+// TC: O(n)
+// SC: O(1)
+function isPalindrome(s: string): boolean {
+
+     let L = 0;
+     let R = s.length-1;
+    
+    while(R > 0 && L < s.length - 1 && L <= R) {
+        if(!isAlphanumeric(s[L])) {
+            L++;
+            continue;
+        }
+        if(!isAlphanumeric(s[R])) {
+            R--;
+            continue;
+        }
+        if(s[L].toLowerCase() !==  s[R].toLowerCase()) {
+            return false;
+        }
+        L++;
+        R--;
+    }
+
+    return true;
+};
+
+function isAlphanumeric(str: string): boolean {
+    return /^[a-zA-Z0-9]+$/.test(str);
+}

From 955cce81aa6b2b333c5241203a9b2ee951f9d28c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=A4=80=EC=98=81?= <junzero741@gmail.com>
Date: Wed, 18 Mar 2026 09:15:36 +0900
Subject: [PATCH 2/2] =?UTF-8?q?number-of-1-bits=20=ED=92=80=EC=9D=B4=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 number-of-1-bits/junzero741.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 number-of-1-bits/junzero741.ts

diff --git a/number-of-1-bits/junzero741.ts b/number-of-1-bits/junzero741.ts
new file mode 100644
index 000000000..2c8aa49cd
--- /dev/null
+++ b/number-of-1-bits/junzero741.ts
@@ -0,0 +1,13 @@
+// TC: O(log n)
+// SC: O(1)
+function hammingWeight(n: number): number {
+    const binary = n.toString(2);
+    let bits = 0;
+    for(let i = 0; i < binary.length; i++) {
+        if(binary[i] === '1') {
+            bits++;
+        }
+    }
+
+    return bits;
+};