diff --git a/homeworks/HW1/src/main/java/ru.atom/Util.java b/homeworks/HW1/src/main/java/ru.atom/Util.java
index 383551b020..0dbaad4a80 100644
--- a/homeworks/HW1/src/main/java/ru.atom/Util.java
+++ b/homeworks/HW1/src/main/java/ru.atom/Util.java
@@ -1,14 +1,16 @@
 package ru.atom;
 
+import java.util.Arrays;
+import java.util.Collections;
+
 /**
  * In this assignment you need to implement the following util methods.
  * Note:
- *  throw new UnsupportedOperationException(); - is just a stub
+ * throw new UnsupportedOperationException(); - is just a stub
  */
 public class Util {
 
 
-
     /**
      * Returns the greatest of {@code int} values.
      *
@@ -16,6 +18,15 @@ public class Util {
      * @return the largest of values.
      */
     public static int max(int[] values) {
+        if (values.length > 0) {
+            int max = values[0];
+            for (int i = 0; i < values.length; ++i) {
+                if (max < values[i]) {
+                    max = values[i];
+                }
+            }
+            return max;
+        }
         throw new UnsupportedOperationException();
     }
 
@@ -26,6 +37,13 @@ public static int max(int[] values) {
      * @return the sum of all values.
      */
     public static long sum(int[] values) {
+        if (values.length > 0) {
+            long sum = 0;
+            for (int a : values) {
+                sum += a;
+            }
+            return sum;
+        }
         throw new UnsupportedOperationException();
     }