From 4a109c6d685383692447a794548cf5857c0ef015 Mon Sep 17 00:00:00 2001
From: DEBASIS <185465407+DebaA17@users.noreply.github.com>
Date: Sat, 29 Aug 2026 19:00:05 +0530
Subject: [PATCH] feat: implement sl_3 and sl_4 solutions

---
 sl_3/AddNumbers.java | 12 ++++++++++++
 sl_4/LeapYear.java   | 15 +++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 sl_3/AddNumbers.java
 create mode 100644 sl_4/LeapYear.java

diff --git a/sl_3/AddNumbers.java b/sl_3/AddNumbers.java
new file mode 100644
index 0000000..1c71581
--- /dev/null
+++ b/sl_3/AddNumbers.java
@@ -0,0 +1,12 @@
+import java.util.Scanner;
+
+public class AddNumbers {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter first number: ");
+        int a = sc.nextInt();
+        System.out.print("Enter second number: ");
+        int b = sc.nextInt();
+        System.out.println("Sum: " + (a + b));
+    }
+}
diff --git a/sl_4/LeapYear.java b/sl_4/LeapYear.java
new file mode 100644
index 0000000..d5f7f18
--- /dev/null
+++ b/sl_4/LeapYear.java
@@ -0,0 +1,15 @@
+import java.util.Scanner;
+
+public class LeapYear {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter a year: ");
+        int year = sc.nextInt();
+        boolean isLeap = (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
+        if (isLeap) {
+            System.out.println(year + " is a leap year.");
+        } else {
+            System.out.println(year + " is not a leap year.");
+        }
+    }
+}