Fix package declarations (#2576)

DataStructures/Graphs/A_Star.java

@@ -2,9 +2,8 @@
 	Time Complexity = O(E), where E is equal to the number of edges
 */
 
-package Graphs;
+package DataStructures.Graphs;
 
-import java.lang.reflect.Array;
 import java.util.*;
 
 public class A_Star {

DataStructures/Graphs/DIJSKSTRAS_ALGORITHM.java

@@ -4,9 +4,6 @@ for better understanding
 */
 package DataStructures.Graphs;
 
-import java.util.*;
-import java.io.*;
-
 class dijkstras{
 
     int k=9;

DataStructures/Graphs/KahnsAlgorithm.java

@@ -1,4 +1,4 @@
-package Graphs;
+package DataStructures.Graphs;
 
 import java.util.ArrayList;
 import java.util.Map;
@@ -104,7 +104,6 @@ class TopologicalSort<E extends Comparable<E>>{
      */
     ArrayList<E> topSortOrder(){
         calculateInDegree();
-        int count = 0;
         Queue<E> q = new LinkedList<E>();
         
         for(E vertex: inDegree.keySet()){

DataStructures/Graphs/Kruskal.java

@@ -1,3 +1,5 @@
+package DataStructures.Graphs;
+
 // Problem -> Connect all the edges with the minimum cost.
 // Possible Solution -> Kruskal Algorithm (KA), KA finds the minimum-spanning-tree, which means, the
 // group of edges with the minimum sum of their weights that connect the whole graph.

DataStructures/Lists/RemoveDuplicateNodes.java

@@ -1,7 +1,5 @@
 package DataStructures.Lists;
 
-import DataStructures.Lists.Node;
-
 public class RemoveDuplicateNodes {
 
     public Node deleteDuplicates(Node head) {

DataStructures/Queues/CircularQueue.java

@@ -1,3 +1,5 @@
+package DataStructures.Queues;
+
 //This program implements the concept of CircularQueue in Java
 //Link to the concept: (https://en.wikipedia.org/wiki/Circular_buffer)
 

DataStructures/Trees/BSTIterative.java

@@ -1,3 +1,5 @@
+package DataStructures.Trees;
+
 /**
  *
  *

DataStructures/Trees/BSTRecursive.java

@@ -1,3 +1,5 @@
+package DataStructures.Trees;
+
 /**
  *
  *

DataStructures/Trees/LCA.java

@@ -1,4 +1,4 @@
-package Trees;
+package DataStructures.Trees;
 
 import java.util.ArrayList;
 import java.util.Scanner;

DivideAndConquer/BinaryExponentiation.java

@@ -1,3 +1,5 @@
+package DivideAndConquer;
+
 public class BinaryExponentiation {
 
     public static void main(String args[]) {

DivideAndConquer/ClosestPair.java

@@ -1,7 +1,5 @@
 package DivideAndConquer;
 
-import java.io.IOException;
-
 /**
  * For a set of points in a coordinates system (10000 maximum), ClosestPair class calculates the two
  * closest points.

DivideAndConquer/StrassenMatrixMultiplication.java

@@ -1,3 +1,5 @@
+package DivideAndConquer;
+
 // Java Program to Implement Strassen Algorithm
  
 // Class Strassen matrix multiplication

DynamicProgramming/DiceThrow.java

@@ -1,3 +1,5 @@
+package DynamicProgramming;
+
 // Given N dice each with M faces, numbered from 1 to M, find the number of ways to get sum X.
 // X is the summation of values on each face when all the dice are thrown.
 
@@ -14,9 +16,6 @@ Following is implementation of Dynamic Programming approach. */
 // Code ---->
 // Java program to find number of ways to get sum 'x' with 'n' 
 // dice where every dice has 'm' faces 
-import java.util.*;
-import java.lang.*;
-import java.io.*;
 
 class DP {
     /* The main function that returns the number of ways to get sum 'x' with 'n' dice and 'm' with m faces. */

DynamicProgramming/LongestPalindromicSubsequence.java

@@ -1,7 +1,4 @@
-package test;
+package DynamicProgramming;
-
-import java.io.*;
-import java.util.*;
 
 /**
  * Algorithm explanation https://www.educative.io/edpresso/longest-palindromic-subsequence-algorithm

DynamicProgramming/LongestPalindromicSubstring.java

@@ -1,7 +1,4 @@
-package test;
+package DynamicProgramming;
-
-import java.io.*;
-import java.util.*;
 
 /*
  * Algorithm explanation https://leetcode.com/problems/longest-palindromic-substring/

DynamicProgramming/MinimumSumPartition.java

@@ -15,9 +15,6 @@ Subset1 = {7, 46} ;  sum of Subset1 = 53
 Subset2 = {36, 40} ; sum of Subset2  = 76
  */
 
-import java.io.*;
-import java.util.*;
-
 public class MinimumSumPartition {
   public static int subSet(int[] arr) {
     int n = arr.length;

DynamicProgramming/PalindromicPartitioning.java

@@ -1,4 +1,7 @@
 package DynamicProgramming;
+
+import java.util.Scanner;
+
 /**
  * @file
  * @brief Implements [Palindrome
@@ -16,9 +19,6 @@ package DynamicProgramming;
  * "aba | b | bbabb | ababa"
  * @author [Syed] (https://github.com/roeticvampire)
  */
-
-import java.util.Scanner;
-
 public class PalindromicPartitioning {
   
     public static int minimalpartitions(String word){
@@ -31,7 +31,7 @@ public class PalindromicPartitioning {
            int[] minCuts = new int[len];
            boolean[][] isPalindrome = new boolean[len][len];
     
-           int i, j, k, L; // different looping variables
+           int i, j, L; // different looping variables
     
            // Every substring of length 1 is a palindrome
            for (i = 0; i < len; i++) {

DynamicProgramming/ShortestCommonSupersequenceLength.java

@@ -1,3 +1,5 @@
+package DynamicProgramming;
+
 // Java program to find length of the shortest supersequence
 class ShortestSuperSequence {
  

DynamicProgramming/Sum_Of_Subset.java

@@ -1,3 +1,5 @@
+package DynamicProgramming;
+
 public class Sum_Of_Subset {
         public static void main(String[] args){
     

Maths/AutomorphicNumber.java

@@ -1,3 +1,5 @@
+package Maths;
+
 /**
  * A number is said to be an Automorphic, if it is present in the last digit(s) of its square.
  * Example- Let the number be 25, its square is 625.

Maths/CircularConvolutionFFT.java

@@ -1,4 +1,4 @@
-package com.maths;
+package Maths;
 
 import java.util.ArrayList;
 

Maths/Convolution.java

@@ -1,4 +1,4 @@
-package com.maths;
+package Maths;
 
 /**
  * Class for linear convolution of two discrete signals

Maths/ConvolutionFFT.java

@@ -1,4 +1,4 @@
-package com.maths;
+package Maths;
 
 import java.util.ArrayList;
 

Maths/FFT.java

@@ -1,4 +1,4 @@
-package com.maths;
+package Maths;
 
 import java.util.ArrayList;
 import java.util.Collections;

Maths/FFTBluestein.java

@@ -1,4 +1,4 @@
-package com.maths;
+package Maths;
 
 import java.util.ArrayList;
 

Maths/GenericRoot.java

@@ -1,3 +1,5 @@
+package Maths;
+
 /*
  * Algorithm explanation: https://technotip.com/6774/c-program-to-find-generic-root-of-a-number/#:~:text=Generic%20Root%3A%20of%20a%20number,get%20a%20single%2Ddigit%20output.&text=For%20Example%3A%20If%20user%20input,%2B%204%20%2B%205%20%3D%2015.
  */

Maths/KeithNumber.java

@@ -1,4 +1,7 @@
-import java.util.*;  
+package Maths;
+
+import java.util.*;
+
 class KeithNumber  
 {  
     //user-defined function that checks if the given number is Keith or not  

Maths/KrishnamurthyNumber.java

@@ -1,4 +1,4 @@
-//package Maths;
+package Maths;
 
 /* This is a program to check if a number is a Krishnamurthy number or not.
 A number is a Krishnamurthy number if the sum of the factorials of the digits of the number is equal to the number itself.

Maths/MagicSquare.java

@@ -1,4 +1,7 @@
+package Maths;
+
 import java.util.*;
+
 /*A magic square of order n is an arrangement of distinct n^2 integers,in a square, such that the n numbers in all
 rows, all columns, and both diagonals sum to the same constant. A magic square contains the integers from 1 to n^2.*/
 public class MagicSquare {

Maths/RomanNumeralUtil.java

@@ -1,3 +1,5 @@
+package Maths;
+
 /**
  * Translates numbers into the Roman Numeral System.
  *

Misc/TwoSumProblem.java

@@ -1,5 +1,8 @@
+package Misc;
+
 import java.util.*;
 import java.util.stream.Collectors;
+
 public class TwoSumProblem {
 	public static void main(String args[])
 	{

Misc/WordBoggle.java

@@ -1,3 +1,5 @@
+package Misc;
+
 import java.util.*;
 
 public class WordBoggle {

Others/Implementing_auto_completing_features_using_trie.java

@@ -1,13 +1,7 @@
 package Others;
 
-
 // Java Program to implement Auto-Complete 
 // Feature using Trie
-
-import java.util.*;
-import java.io.*;
-import java.lang.*;
-
 class Trieac {
     
     // Alphabet size (# of symbols) 

Others/RabinKarp.java

@@ -1,3 +1,5 @@
+package Others;
+
 /** @author Prateek Kumar Oraon (https://github.com/prateekKrOraon) */
 import java.util.Scanner;
 

Others/RestrictedTowerOfHanoi/Main/Hanoi.java

@@ -1,3 +1,5 @@
+package Others.RestrictedTowerOfHanoi.Main;
+
 import java.awt.*;
 import java.awt.event.*;
 import java.util.*;

Others/StringMatchFiniteAutomata.java

@@ -1,3 +1,5 @@
+package Others;
+
 /** @author Prateek Kumar Oraon (https://github.com/prateekKrOraon) */
 import java.util.Scanner;
 

Searches/HowManyTimesRotated.java

@@ -1,3 +1,7 @@
+package Searches;
+
+import java.util.*;
+
 /*
     Problem Statement: 
     Given an array, find out how many times it has to been rotated 
@@ -19,10 +23,7 @@
     1. [1,2,3,4] Number of rotations: 0 or 4(Both valid)
     2. [15,17,2,3,5] Number of rotations: 3
 */
-
+class HowManyTimesRotated
-import java.util.*;
-
-class howManyTimesRotated
 {
     public static void main(String[] args) 
     {
@@ -42,11 +43,11 @@ class howManyTimesRotated
         int low = 0;
         int high = a.length-1;
         int mid=0; // low + (high-low)/2 = (low + high)/2
-        int i=0;
+        
         while(low<=high)
         {
             mid = low + (high-low)/2;
-            i++;
+            
             if(a[mid]<a[mid-1] && a[mid]<a[mid+1])
             {
                 break;

Searches/PerfectBinarySearch.java

@@ -1,7 +1,5 @@
 package Searches;
 
-import java.util.*;
-
 class PerfectBinarySearch {
 
   static int binarySearch(int[] arr, int target) {

Sorts/MergeSortRecursive.java

@@ -1,3 +1,5 @@
+package Sorts;
+
 import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;

Strings/List_all_Possible_Words_From_Phone_Digits.java

@@ -1,7 +1,5 @@
 package Strings;
 import java.util.*;
-import java.lang.*;
-import java.io.*;
 
 public class List_all_Possible_Words_From_Phone_Digits {
  

Strings/LongestPalindromicSubstring.java

@@ -1,7 +1,8 @@
+package Strings;
+
 // Longest Palindromic Substring
 import java.util.Scanner;;
 
-
 class LongestPalindromicSubstring {
     public static void main(String[] args) {
         Solution s = new Solution();

Strings/WordLadder.java

@@ -1,6 +1,5 @@
 package Strings;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Arrays;
 import java.util.LinkedList;