diff --git a/src/homework/Main.java b/src/homework/Main.java
index ed3d1ee..1f8dba9 100644
--- a/src/homework/Main.java
+++ b/src/homework/Main.java
@@ -1,8 +1,80 @@
 package homework;
 
+import javax.sql.rowset.serial.SQLOutputImpl;
+
 public class Main {
 
     public static void main(String[] args) {
-	// write your code here
+        detectAndPrintNumberSign(-5);
+        detectAndPrintNumberSign(0);
+        detectAndPrintNumberSign(7);
+        boolean res = checkNumberSign(6);
+        printStringNumberOfTimes("Hello", 5);
+        System.out.println(year(400));
+        System.out.println(year(800));
+        System.out.println(year(1200));
+        System.out.println(year(1201));
+        System.out.println(year(100));
+        System.out.println(year(200));
+        System.out.println(year(300));
+        System.out.println(year(104));
+        System.out.println(year(3));
+        System.out.println(year(4));
+        System.out.println(year(7));
+        System.out.println(year(8));
+    }
+
+    public static boolean checkSum(int a, int b) {
+
+        int s = a + b;
+        if ((s >= 10) && (s <= 20)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public static void detectAndPrintNumberSign(int number) {
+        if (number < 0) {
+            System.out.println("Отрицательное: " + number);
+        } else {
+            System.out.println("Положительное: " + number);
+        }
+
+    }
+
+    public static boolean checkNumberSign(int a) {
+
+        if (a < 0) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public static void printStringNumberOfTimes(String str, int numberOfTimes) {
+
+        for (int i = 0; i < numberOfTimes; i++) {
+            System.out.println(str);
+        }
+
+
+    }
+
+    public static boolean year(int year) {
+        System.out.println();
+        System.out.println("year: " + year);
+        if (year % 100 == 0 && year % 400 != 0) {
+
+            return false;
+        } else if (year % 400 == 0) {
+            return true;
+        } else if (year % 4 == 0) {
+            return true;
+        } else {
+            return false;
+        }
     }
 }
+
+