balls

src/Main.java

@@ -0,0 +1,25 @@
+public class Main
+{
+    public static int smallestSubarrayLength(int[] arr, int target)
+    {
+        int smallest = 0;
+
+        for (int i = 0; i < arr.length; i++)
+        {
+            int sum = 0;
+
+            for (int j = i; j < arr.length; j++)
+            {
+                if (sum + arr[j] > target) break;
+                else if (sum + arr[j] == target) 
+                {
+                    smallest = j - (i - 1);
+                    break;
+                }
+                else sum += arr[j];
+            }
+        }
+
+        return smallest;
+    }
+}

test/MainTest.java

@@ -0,0 +1,24 @@
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class MainTest 
+{
+    @Test
+    public void test_1() 
+    {
+        assertEquals(2, Main.smallestSubarrayLength(new int[]{2, 3, 1, 2, 4, 3}, 7));
+    }
+
+    @Test
+    public void test_2() 
+    {
+        assertEquals(0, Main.smallestSubarrayLength(new int[]{1, 2, 3, 4}, 20));
+    }
+
+    @Test
+    public void test_3() 
+    {
+        assertEquals(2, Main.smallestSubarrayLength(new int[]{1, 2, 3, 4, 5}, 9));
+    }
+}
+