Fixing packages.

DataStructures/Graphs/BellmanFord.java

@@ -1,3 +1,5 @@
+package DataStructures.Graphs;
+
 import java.util.*;
 class BellmanFord
 /*Implementation of Bellman ford to detect negative cycles. Graph accepts inputs in form of edges which have 

DataStructures/Queues/LinkedQueue.java

@@ -1,4 +1,4 @@
-package DataStructures;
+package DataStructures.Queues;
 
 import java.util.NoSuchElementException;
 

DataStructures/Stacks/NodeStack.java

@@ -1,3 +1,4 @@
+package DataStructures.Stacks;
 /**
 * Implementation of a stack using nodes.
 * Unlimited size, no arraylist.

DataStructures/Stacks/StackArray.java

@@ -1,3 +1,5 @@
+package DataStructures.Stacks;
+
 /**
  * This class implements a Stack using a regular array.
  * <p>

DataStructures/Stacks/StackArrayList.java

@@ -1,3 +1,5 @@
+package DataStructures.Stacks;
+
 import java.util.ArrayList;
 
 /**

DataStructures/Stacks/StackOfLinkedList.java

@@ -1,5 +1,7 @@
 package DataStructures.Stacks;
 
+import java.util.NoSuchElementException;
+
 /**
  * @author Varun Upadhyay (https://github.com/varunu28)
  */

Maths/Pow.java

@@ -1,4 +1,4 @@
-package maths;
+package Maths;
 
 //POWER (exponentials) Examples (a^b)
 public class Pow {