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0001-Work-in-progress.patch
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0001-Work-in-progress.patch
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From 5271b0b06a74cd82da2715bca006c9431ab45447 Mon Sep 17 00:00:00 2001
From: Pulkit Gupta-GGN <Pulkit_Gupta-GGN@external.mckinsey.com>
Date: Mon, 5 Apr 2021 13:53:50 +0530
Subject: [PATCH] Work in progress
---
.DS_Store | Bin 6148 -> 8196 bytes
.../done/arrays/HotelBookingPossible.java | 6 +-
.../done/dp/CoinChangingProblem.java | 37 +++
.../done/dp/Knapsack.java | 75 ++++++
.../done/graphs/ShortestPathBetweenNodes.java | 7 +
.../done/stacks/NStackUsage.java | 41 ++++
.../done/trees/LongestConsecutiveBranch.java | 20 ++
...ncludingNonRootAndNonLeafWithGivenSum.java | 94 ++++++++
.../todo/DeleteANodeFromBinaryTree.java | 7 +
src/main/java/com/pulkit/jyoti/GraphNode.java | 137 +++++++++++
to be committed/BoxStackingProblem.java | 46 ++++
to be committed/ConnectNodesAtSameLevel.java | 181 ++++++++++++++
to be committed/CuttingARod.java | 65 +++++
.../FlattenBinaryTreeToSinglyLinkedList.java | 86 +++++++
to be committed/GenerateParentheses.java | 25 ++
to be committed/HouseThief.java | 25 ++
to be committed/KeyPadProblem.java | 51 ++++
to be committed/KeyPadProblemm.java | 59 +++++
to be committed/KnapsackProblem.java | 224 ++++++++++++++++++
to be committed/Permutation.java | 43 ++++
to be committed/PriorityQueueTrial.java | 14 ++
to be committed/RottenTomatoes.java | 27 +++
to be committed/SearchSystem.java | 88 +++++++
to be committed/SkyLineProblem.java | 70 ++++++
to be committed/SubSetSumProblem.java | 129 ++++++++++
to be committed/Subset.java | 39 +++
to be committed/Subtree.java | 49 ++++
to be committed/WordLadderII.java | 106 +++++++++
28 files changed, 1748 insertions(+), 3 deletions(-)
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/done/dp/CoinChangingProblem.java
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/done/dp/Knapsack.java
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/done/graphs/ShortestPathBetweenNodes.java
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/done/stacks/NStackUsage.java
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/done/trees/LongestConsecutiveBranch.java
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/done/trees/PathsIncludingNonRootAndNonLeafWithGivenSum.java
create mode 100644 src/main/java/com/pulkit/datastructures_algorithms/todo/DeleteANodeFromBinaryTree.java
create mode 100644 src/main/java/com/pulkit/jyoti/GraphNode.java
create mode 100644 to be committed/BoxStackingProblem.java
create mode 100644 to be committed/ConnectNodesAtSameLevel.java
create mode 100644 to be committed/CuttingARod.java
create mode 100644 to be committed/FlattenBinaryTreeToSinglyLinkedList.java
create mode 100644 to be committed/GenerateParentheses.java
create mode 100644 to be committed/HouseThief.java
create mode 100644 to be committed/KeyPadProblem.java
create mode 100644 to be committed/KeyPadProblemm.java
create mode 100644 to be committed/KnapsackProblem.java
create mode 100644 to be committed/Permutation.java
create mode 100644 to be committed/PriorityQueueTrial.java
create mode 100644 to be committed/RottenTomatoes.java
create mode 100644 to be committed/SearchSystem.java
create mode 100644 to be committed/SkyLineProblem.java
create mode 100644 to be committed/SubSetSumProblem.java
create mode 100644 to be committed/Subset.java
create mode 100644 to be committed/Subtree.java
create mode 100644 to be committed/WordLadderII.java
diff --git a/.DS_Store b/.DS_Store
index bfe60e09190098dd3a2b121aa3f3627b9cef99b0..c8d01059bbb6ab0ddf8ab55cdb9b59f0296a8d03 100644
GIT binary patch
delta 479
zcmZoMXmOBWU|?W$DortDU;r^WfEYvza8E20o2aMAD7Z0TH}hr%jz7$c**Q2SHn1=X
zPUd0xx>=pIn=zK3p@boyL4hHOAr(j_1KGJim<bdu0g9w}=Hw?Q<>V)U%mdoO2E^X~
z!2l@2z(7Fv<Rh&8%*G~Wlf&5D>ItaLNjD5m&d)6Xn+qWb=*Z1?ae=yxBj2E9t4ir1
zN8E0zhj}SCKZOKsFkJ;1q&lxGxF|0tKQA5VBt}LChRr8LY?voD@CY(PJSV{oq+LPL
ev{{hjJM(0I5zoo~JRBTArJxvO*c{I@hZz7L$Ydk{
delta 136
zcmZp1XfcprU|?W$DortDU=RQ@Ie-{Mvv5r;6q~50$jH4hU^g=(_hcS{uhPs6`3$8D
zC7wC?$w@i+Nl>NMKzhdJZvxX8H<pAlE@tQ85M%}l0f7KFkZ=VVwz2R#^JIP*Pms|J
QOb}~8HZyFF=b6I{0K*R$9{>OV
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/arrays/HotelBookingPossible.java b/src/main/java/com/pulkit/datastructures_algorithms/done/arrays/HotelBookingPossible.java
index 02a7276..4ba29ef 100644
--- a/src/main/java/com/pulkit/datastructures_algorithms/done/arrays/HotelBookingPossible.java
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/arrays/HotelBookingPossible.java
@@ -24,15 +24,15 @@ public class HotelBookingPossible {
public static void main(String[] args) {
List<Integer> arrive = Arrays.asList(1, 2, 3, 4);
List<Integer> depart = Arrays.asList(10, 2, 6, 14);
- int K = 4; //true
+ int numberOfRooms = 4; //true
//Another Test case
//List<Integer> arrive = Arrays.asList(1, 2, 3);
//List<Integer> depart = Arrays.asList(2, 3, 4);
- //int K = 1; //true
+ //int numberOfRooms = 1; //true
HotelBookingPossible hotelBookingPossible = new HotelBookingPossible();
- System.out.println(hotelBookingPossible.hotel(arrive, depart, K));
+ System.out.println(hotelBookingPossible.hotel(arrive, depart, numberOfRooms));
}
private boolean hotel(List<Integer> arrive, List<Integer> depart, int K) {
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/dp/CoinChangingProblem.java b/src/main/java/com/pulkit/datastructures_algorithms/done/dp/CoinChangingProblem.java
new file mode 100644
index 0000000..03c72e2
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/dp/CoinChangingProblem.java
@@ -0,0 +1,37 @@
+package com.pulkit.datastructures_algorithms.done.dp;
+
+public class CoinChangingProblem {
+ public static void main(String[] args) {
+ int coinsDenominationsAvailable[] = {1, 2, 5};
+ int amount = 7;
+ Counter counter = new Counter(0);
+ calculatePossibleChange(amount, coinsDenominationsAvailable, 0, 0, counter);
+ System.out.println(counter.count);
+ }
+
+ static void calculatePossibleChange(int amount, int coins[], int currentSum, int currentIndex, Counter counter) {
+ System.out.println("Executing for " + currentIndex + " " + currentSum);
+
+ if (amount < 0)
+ return;
+
+ if (currentSum > amount)
+ return;
+
+ if (currentSum == amount)
+ counter.count++;
+
+ for (int index = currentIndex; index < coins.length; index++) {
+ calculatePossibleChange(amount, coins, currentSum + coins[index],
+ index, counter);
+ }
+ }
+}
+
+class Counter {
+ int count;
+
+ public Counter(int count) {
+ this.count = count;
+ }
+}
\ No newline at end of file
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/dp/Knapsack.java b/src/main/java/com/pulkit/datastructures_algorithms/done/dp/Knapsack.java
new file mode 100644
index 0000000..943a18c
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/dp/Knapsack.java
@@ -0,0 +1,75 @@
+package com.pulkit.datastructures_algorithms.done.dp;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+public class Knapsack {
+ public static void main(String[] args) {
+ int[] profits = {3, 5, 7, 9, 11, 12};
+ int[] weights = {100, 110, 120, 220, 90, 100};
+
+ int maximumCapacity = 300;
+
+ int maxProfit = findMaxProfit(profits, weights, 0, maximumCapacity, 0, new HashMap<>());
+ System.out.println(maxProfit);
+ }
+
+ //2^N (Exponential)
+ private static int findMaxProfit(int[] profits, int[] weights, int currentProfit, int capacityRemaining,
+ int index, Map<Pair, Integer> cache) {
+ if (capacityRemaining < 0)
+ return currentProfit - profits[index - 1];
+
+ if (profits.length == 0)
+ return 0;
+
+ if (capacityRemaining == 0)
+ return currentProfit;
+
+ Pair key = new Pair(currentProfit, capacityRemaining);
+
+ if (cache.containsKey(key)) {
+ return cache.get(key);//Dp = recursion + memoization
+
+ } else {
+
+ int profitWhenWeStoleCurrentItem = findMaxProfit(profits, weights, currentProfit + profits[index],
+ capacityRemaining - weights[index], index++, cache);
+
+ int profitWhenWeDidNotStoleCurrentItem = findMaxProfit(profits, weights, currentProfit,
+ capacityRemaining, index++, cache);
+
+ int finalResult = Math.max(profitWhenWeStoleCurrentItem, profitWhenWeDidNotStoleCurrentItem);
+
+ Pair key1 = new Pair(currentProfit, capacityRemaining);
+ cache.put(key1, finalResult);
+
+ return finalResult;
+ }
+ }
+
+ static class Pair {
+ int currentProfit;
+ int capacityRemaining;
+
+ public Pair(int currentProfit, int capacityRemaining) {
+ this.currentProfit = currentProfit;
+ this.capacityRemaining = capacityRemaining;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) return true;
+ if (!(o instanceof Pair)) return false;
+ Pair pair = (Pair) o;
+ return currentProfit == pair.currentProfit &&
+ capacityRemaining == pair.capacityRemaining;
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(currentProfit, capacityRemaining);
+ }
+ }
+}
\ No newline at end of file
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/graphs/ShortestPathBetweenNodes.java b/src/main/java/com/pulkit/datastructures_algorithms/done/graphs/ShortestPathBetweenNodes.java
new file mode 100644
index 0000000..428b49f
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/graphs/ShortestPathBetweenNodes.java
@@ -0,0 +1,7 @@
+package com.pulkit.datastructures_algorithms.done.graphs;
+
+public class ShortestPathBetweenNodes {
+ public static void main(String[] args) {
+
+ }
+}
\ No newline at end of file
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/stacks/NStackUsage.java b/src/main/java/com/pulkit/datastructures_algorithms/done/stacks/NStackUsage.java
new file mode 100644
index 0000000..01272a5
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/stacks/NStackUsage.java
@@ -0,0 +1,41 @@
+package com.pulkit.datastructures_algorithms.done.stacks;
+
+public class NStackUsage {
+ public static void main(String[] args) {
+ NStack stacks = new NStack(3, 10);
+ stacks.put(0, 10);
+ stacks.put(2, 11);
+ System.out.println(stacks.pop(0));
+ System.out.println(stacks.pop(2));
+ }
+}
+
+class NStack {
+ private int[] stackArray;
+ private int[] stackHeadPointer;
+
+ public NStack(int numberOfStack, int capacityOfEachStack) {
+ stackArray = new int[numberOfStack * capacityOfEachStack];
+ stackHeadPointer = new int[numberOfStack];
+ initializeStackHeadPointer(capacityOfEachStack);
+ }
+
+ public void put(int stackNumber, int element) {
+ stackArray[stackHeadPointer[stackNumber]] = element;
+ stackHeadPointer[stackNumber]++;
+ }
+
+ public Integer pop(int stackNumber) {
+ int currentHead = stackHeadPointer[stackNumber];
+ stackHeadPointer[stackNumber]--;
+ return stackArray[currentHead];
+ }
+
+ private void initializeStackHeadPointer(int capacityOfEachStack) {
+ int startingIndex = 0;
+ for (int index = 0; index < stackHeadPointer.length; index++) {
+ stackHeadPointer[index] = startingIndex;
+ startingIndex += capacityOfEachStack;
+ }
+ }
+}
\ No newline at end of file
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/trees/LongestConsecutiveBranch.java b/src/main/java/com/pulkit/datastructures_algorithms/done/trees/LongestConsecutiveBranch.java
new file mode 100644
index 0000000..151166a
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/trees/LongestConsecutiveBranch.java
@@ -0,0 +1,20 @@
+package com.pulkit.datastructures_algorithms.done.trees;
+
+public class LongestConsecutiveBranch {
+ public static void main(String[] args) {
+
+ }
+
+ static void find(TreeNode node) {
+ if (node == null)
+ return;
+
+ if (node.leftChild.data == node.data + 1) {
+ find(node.leftChild);
+ }
+
+ if (node.rightChild.data == node.data + 1) {
+ find(node.rightChild);
+ }
+ }
+}
\ No newline at end of file
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/done/trees/PathsIncludingNonRootAndNonLeafWithGivenSum.java b/src/main/java/com/pulkit/datastructures_algorithms/done/trees/PathsIncludingNonRootAndNonLeafWithGivenSum.java
new file mode 100644
index 0000000..3641ccd
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/done/trees/PathsIncludingNonRootAndNonLeafWithGivenSum.java
@@ -0,0 +1,94 @@
+package com.pulkit.datastructures_algorithms.done.trees;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class PathsIncludingNonRootAndNonLeafWithGivenSum {
+ public static void main(String[] args) {
+ //TreeNode root = singlePathWith7AsGivenSum();
+
+ TreeNode root = dualPathWith7AsGivenSum();
+ LinkedList<List<TreeNode>> paths = new LinkedList<>();
+ findPaths(new Sum(7), root, paths, new LinkedList<>());
+ }
+
+ /*
+ 1
+ 2 3
+ 4 5 3
+ */
+
+ public static void findPaths(Sum givenSum, TreeNode root, List<List<TreeNode>> paths,
+ List<TreeNode> currentPath) {
+ if (root == null) {
+ return;
+ }
+
+ currentPath.add(root);
+ givenSum.subtract(root.data);
+
+ if (givenSum.value == 0) {
+ List<TreeNode> tempList = new LinkedList<>(currentPath);
+ paths.add(tempList);
+ }
+
+ if (givenSum.value < 0) {
+ if (!currentPath.isEmpty()) {
+ TreeNode topElement = currentPath.remove(0);
+ givenSum.add(topElement.data);
+ }
+ }
+ if (root.leftChild != null) {
+ findPaths(givenSum, root.leftChild, paths, currentPath);
+ if (!currentPath.isEmpty()) {
+ currentPath.remove(currentPath.size() - 1);
+ givenSum.add(root.leftChild.data);
+ }
+ }
+ if (root.rightChild != null) {
+ findPaths(givenSum, root.rightChild, paths, currentPath);
+ if (!currentPath.isEmpty()) {
+ currentPath.remove(currentPath.size() - 1);
+ givenSum.add(root.rightChild.data);
+ }
+ }
+ }
+
+ private static class Sum {
+ int value;
+
+ public Sum(int value) {
+ this.value = value;
+ }
+
+ void add(int element) {
+ this.value += element;
+ }
+
+ void subtract(int element) {
+ this.value -= element;
+ }
+ }
+
+ private static TreeNode singlePathWith7AsGivenSum() {
+ TreeNode six = new TreeNode(6, null, null);
+ TreeNode five = new TreeNode(5, null, null);
+ TreeNode four = new TreeNode(4, null, null);
+ TreeNode three = new TreeNode(3, six, null);
+ TreeNode two = new TreeNode(2, four, five);
+ TreeNode root = new TreeNode(1, two, three);
+
+ return root;
+ }
+
+ private static TreeNode dualPathWith7AsGivenSum() {
+ TreeNode six = new TreeNode(3, null, null);
+ TreeNode five = new TreeNode(5, null, null);
+ TreeNode four = new TreeNode(4, null, null);
+ TreeNode three = new TreeNode(3, six, null);
+ TreeNode two = new TreeNode(2, four, five);
+ TreeNode root = new TreeNode(1, two, three);
+
+ return root;
+ }
+}
diff --git a/src/main/java/com/pulkit/datastructures_algorithms/todo/DeleteANodeFromBinaryTree.java b/src/main/java/com/pulkit/datastructures_algorithms/todo/DeleteANodeFromBinaryTree.java
new file mode 100644
index 0000000..33e74b5
--- /dev/null
+++ b/src/main/java/com/pulkit/datastructures_algorithms/todo/DeleteANodeFromBinaryTree.java
@@ -0,0 +1,7 @@
+package com.pulkit.datastructures_algorithms.todo;
+
+public class DeleteANodeFromBinaryTree {
+ public static void main(String[] args) {
+
+ }
+}
diff --git a/src/main/java/com/pulkit/jyoti/GraphNode.java b/src/main/java/com/pulkit/jyoti/GraphNode.java
new file mode 100644
index 0000000..79ae8ae
--- /dev/null
+++ b/src/main/java/com/pulkit/jyoti/GraphNode.java
@@ -0,0 +1,137 @@
+package com.pulkit.jyoti;
+
+import java.util.*;
+
+public class GraphNode {
+ int data;
+ List<GraphNode> neighbours;
+
+ public GraphNode(int data, List<GraphNode> neighbours) {
+ this.data = data;
+ this.neighbours = neighbours;
+ }
+
+ public void setNeighbours(List<GraphNode> neighbours) {
+ this.neighbours = neighbours;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) return true;
+ if (!(o instanceof GraphNode)) return false;
+ GraphNode graphNode = (GraphNode) o;
+ return data == graphNode.data &&
+ neighbours.equals(graphNode.neighbours);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(data, neighbours);
+ }
+
+ @Override
+ public String toString() {
+ return "" + data;
+ }
+
+ public static void main(String[] args) {
+ GraphNode Node5 = new GraphNode(5, null);
+ List<GraphNode> neighbours1 = new LinkedList<>();
+ neighbours1.add(Node5);
+
+ GraphNode Node2 = new GraphNode(2, null);
+ GraphNode Node3 = new GraphNode(3, null);
+ GraphNode Node4 = new GraphNode(4, neighbours1);
+
+
+ List<GraphNode> neighbours = new LinkedList<>();
+ neighbours.add(Node2);
+ neighbours.add(Node3);
+ neighbours.add(Node4);
+ GraphNode initialNode = new GraphNode(1, neighbours);
+
+
+ List<GraphNode> neighbours3 = new LinkedList<>();
+ neighbours3.add(initialNode);
+
+ Node2.setNeighbours(neighbours3);
+ Node3.setNeighbours(neighbours3);
+ Node4.setNeighbours(neighbours3);
+
+ DFS(initialNode, new HashSet<>());
+ }
+
+ public static void DFS(GraphNode node, Set<GraphNode> visited) {
+ //Stack Data structure or recursion
+ if (node == null)
+ return;
+
+ if (visited.contains(node))
+ return;
+
+ System.out.println(node);
+ visited.add(node);
+
+ List<GraphNode> neighbours = node.neighbours;
+
+ if (neighbours != null) {
+ for (GraphNode currentNode : neighbours) {
+ DFS(currentNode, visited);
+ }
+ }
+ }
+
+ public static void findTopologicalSort(Stack<GraphNode> stack, List<GraphNode> graph,
+ Set<GraphNode> visited) {
+ if (graph == null)
+ return;
+
+ for (GraphNode node : graph) {
+
+
+ }
+ }
+}
+
+//C->B->A->D->E / C->B->D->A->E / C->B->E->D->E // 2 or 3 more
+
+
+// B E C A D
+
+
+//(JRE/JVM)java A
+/*
+
+file : A.java -> A.class
+class A {
+B b = new B();
+}
+
+file : D.java -> D.class
+class D {
+B b = new B();
+}
+
+file : E.java -> E.class
+class E {
+B b = new B();
+}
+
+file : B.java -> B.class
+class B {
+C c = new C();
+}
+
+file : C.java -> C.class
+class C {
+//
+}
+
+*/
+/*
+Agra - mumbai
+mumbai - delhi
+delhi - kolkata
+kolata - bangluru
+Agra - banluru
+ */
\ No newline at end of file
diff --git a/to be committed/BoxStackingProblem.java b/to be committed/BoxStackingProblem.java
new file mode 100644
index 0000000..d1a3888
--- /dev/null
+++ b/to be committed/BoxStackingProblem.java
@@ -0,0 +1,46 @@
+package com.mckinsey.engage.app.apis.mappings;
+
+public class BoxStackingProblem {
+ public static void main(String[] args) {
+ int[] lengths = {4, 1, 4, 10};
+ int[] breadths = {6, 2, 5, 12};
+ int[] heights = {7, 3, 6, 32};
+
+ int maxHeight = findMaxHeight(Integer.MAX_VALUE, 0, lengths, breadths, heights, 0);
+ System.out.println(maxHeight);
+ }
+
+ private static int findMaxHeight(int currentBaseArea, int index, int[] lengths, int[] breadths,
+ int[] heights, int maxHeight) {
+ if (lengths.length == 0 || breadths.length == 0 || heights.length == 0)
+ return 0;
+
+ if (index >= lengths.length)
+ return maxHeight;
+
+ int result = 0;
+
+ int firstBasePossibility = lengths[index] * breadths[index];
+ if (firstBasePossibility < currentBaseArea) {
+ result = Math.max(result, findMaxHeight(firstBasePossibility, index + 1, lengths,
+ breadths, heights, maxHeight + heights[index]));
+ }
+
+ int secondBasePossibility = lengths[index] * heights[index];
+ if (secondBasePossibility < currentBaseArea) {
+ result = Math.max(result, findMaxHeight(secondBasePossibility, index + 1, lengths,
+ breadths, heights, maxHeight + breadths[index]));
+ }
+
+ int thirdBasePossibility = heights[index] * breadths[index];
+ if (thirdBasePossibility < currentBaseArea) {
+ result = Math.max(result, findMaxHeight(thirdBasePossibility, index + 1, lengths,
+ breadths, heights, maxHeight + heights[index]));
+ }
+
+ int anotherResult = findMaxHeight(currentBaseArea, index + 1, lengths,
+ breadths, heights, maxHeight);
+
+ return Math.max(result, anotherResult);
+ }
+}
diff --git a/to be committed/ConnectNodesAtSameLevel.java b/to be committed/ConnectNodesAtSameLevel.java
new file mode 100644
index 0000000..d1fcded
--- /dev/null
+++ b/to be committed/ConnectNodesAtSameLevel.java
@@ -0,0 +1,181 @@
+//package com.mckinsey.engage.app.apis.mappings;
+//
+// /*
+// 1
+// 2 3
+// 4 5 6 n
+//n n n 8 9 10 n n
+// 11
+//*/
+//
+//public class ConnectNodesAtSameLevel {
+// public static void main(String[] args) {
+//
+// }
+//
+// private static void connect(TreeNodeWithNext root) {
+// if (root == null)
+// return;
+// if (areBothChildNull(root)) {
+// return;
+// }
+//
+// while (root != null) {
+// TreeNodeWithNext temp = root;
+// while (temp != null) {
+// if (areBothChildNotNull(temp)) {
+// temp.left.next = temp.right;
+// }
+// TreeNodeWithNext next = getNextSibling(temp);
+// if (next != null) {
+// if (temp.right != null) {
+// temp.right = next;
+// } else if (temp.left != null) {
+// temp.left = next;
+// }
+// }
+// temp = moveTempToItsNextTillOneOfChildIsNotNull(temp);
+// }
+//
+// root = getNextChild(root);
+// }
+// }
+//
+// private static TreeNodeWithNext getNextSibling(TreeNodeWithNext temp) {
+// if (temp == null)
+// return null;
+//
+// if (temp.next == null) {
+// return null;
+// }
+//
+// return getNextChild(temp.next);
+// }
+//
+// private static TreeNodeWithNext getNextChild(TreeNodeWithNext temp) {
+// if (temp == null)
+// return temp;
+//
+// while (areBothChildNull(temp)) {
+// temp = temp.next;
+// }
+//
+// if (temp.left != null)
+// return temp.left;
+//
+// if (temp.right != null)
+// return temp.right;
+//
+// return null;
+// }
+//
+// private static TreeNodeWithNext moveTempToItsNextTillOneOfChildIsNotNull(TreeNodeWithNext temp) {
+// if (temp.next == null) {
+// return null;
+// }
+//
+// while (areBothChildNull(temp.next)) {
+// temp = temp.next;
+// }
+//
+// return temp.next;
+// }
+//
+// private static boolean areBothChildNull(TreeNodeWithNext temp) {
+// if (temp == null)
+// return false;
+//
+// return temp.left == null && temp.right == null;
+// }
+//
+// private static boolean areBothChildNotNull(TreeNodeWithNext temp) {
+// if (temp == null)
+// return false;
+//
+// return temp.left != null && temp.right != null;
+// }
+//}
+//
+//
+//class TreeNodeWithNext {
+// int val;
+// TreeNodeWithNext left;
+// TreeNodeWithNext right;
+// TreeNodeWithNext next;
+//
+// TreeNodeWithNext() {
+// }
+//
+// TreeNodeWithNext(int val) {
+// this.val = val;
+// }
+//
+// TreeNodeWithNext(int val, TreeNodeWithNext left, TreeNodeWithNext right) {
+// this.val = val;
+// this.left = left;
+// this.right = right;
+// }
+//}
+///*
+//while root:
+// while root:
+// if root.left:
+// next_level_first_node=root.left
+// break
+// if root.right:
+// next_level_first_node=root.right
+// break
+// root = root.next
+// while root:
+// if root.left and root.right:
+// root.left.next = root.right
+// while root.next:
+// if root.next.left:
+// root.right.next=root.next.left
+// break
+// if root.next.right:
+// root.right.next=root.next.right
+// break
+// root = root.next
+// elif root.left:
+// while root.next:
+// if root.next.left:
+// root.left.next=root.next.left
+// break
+// if root.next.right:
+// root.left.next=root.next.right
+// break
+// root = root.next
+// elif root.right:
+// while root.next:
+// if root.next.left:
+// root.right.next=root.next.left
+// break
+// if root.next.right:
+// root.right.next=root.next.right
+// break
+// root = root.next
+//
+// root = next_level_first_node
+//
+///*
+// 1
+// 2 3
+// 4 5 6 n
+//n n n 8 9 10 n n
+// 11
+//*/
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+// */
diff --git a/to be committed/CuttingARod.java b/to be committed/CuttingARod.java
new file mode 100644
index 0000000..7a675d0
--- /dev/null
+++ b/to be committed/CuttingARod.java
@@ -0,0 +1,65 @@
+package com.mckinsey.engage.app.apis.mappings;
+
+public class CuttingARod {
+ public static void main(String[] args) {
+ int[] length = {1, 2, 3, 4, 5, 6, 7, 8};
+ int[] profit = {1, 5, 8, 9, 10, 17, 17, 20};
+ int totalLength = 8;
+
+// int[] length = {1, 2, 3, 4};
+// int[] profit = {2, 5, 7, 8};
+// int totalLength = 5;
+
+// int[] length = {1, 2};
+// int[] profit = {2, 5};
+// int totalLength = 2;
+
+// int[] length = {1, 2, 3};
+// int[] profit = {2, 5, 7};
+// int totalLength = 3;
+
+ int currentProfit = 0;
+ int index = 0;
+ System.out.println(findMaxProfit(length, profit, currentProfit, totalLength, index));
+ }
+
+ private static int findMaxProfit(int[] length, int[] profit, int currentProfit,
+ int totalLength, int index) {
+
+ if (index >= profit.length) {
+ return currentProfit;
+ }
+
+ if (totalLength < 0) {
+ if (index > 0) {
+ return currentProfit - profit[index];
+ }
+ return 0;
+ }
+
+ if (totalLength == 0) {
+ return currentProfit;
+ }
+
+ int maxProfitWhenCutIsMadeAtCurrentLength = findMaxProfit(length, profit,
+ currentProfit + profit[index], totalLength - length[index],
+ index);
+
+ int maxProfitWhenCutIsMadeAtNextLength = 0;
+
+ if (index + 1 < profit.length) {
+ maxProfitWhenCutIsMadeAtNextLength = findMaxProfit(length, profit,
+ currentProfit + profit[index + 1], totalLength - length[index + 1],
+ index + 1);
+ }
+
+ int maxProfitWhenCutIsNotMadeAtCurrentLength = findMaxProfit(length, profit, currentProfit,
+ totalLength, index + 1);
+
+ int result = Math.max(maxProfitWhenCutIsMadeAtCurrentLength, maxProfitWhenCutIsNotMadeAtCurrentLength);
+ int finalResult = Math.max(maxProfitWhenCutIsMadeAtNextLength, result);
+
+// int finalResult = Math.max(maxProfitWhenCutIsMadeAtNextLength, maxProfitWhenCutIsNotMadeAtCurrentLength);
+ return finalResult;
+ }
+}
\ No newline at end of file
diff --git a/to be committed/FlattenBinaryTreeToSinglyLinkedList.java b/to be committed/FlattenBinaryTreeToSinglyLinkedList.java
new file mode 100644
index 0000000..d47baf0
--- /dev/null
+++ b/to be committed/FlattenBinaryTreeToSinglyLinkedList.java
@@ -0,0 +1,86 @@
+package com.mckinsey.engage.app.apis.mappings;
+
+import java.util.LinkedList;
+import java.util.PriorityQueue;
+import java.util.Queue;
+
+public class FlattenBinaryTreeToSinglyLinkedList {
+ public static void main(String[] args) {
+ TreeNode six = new TreeNode(6, null, null);
+ TreeNode four = new TreeNode(4, null, null);
+ TreeNode three = new TreeNode(3, null, null);
+ TreeNode five = new TreeNode(5, null, six);
+ TreeNode two = new TreeNode(2, three, four);
+ TreeNode root = new TreeNode(1, two, five);
+
+ flatten(root);
+ printLevelOrder(root);
+ }
+
+ static void printLevelOrder(TreeNode root) {
+ PriorityQueue priorityQueue = new PriorityQueue();
+
+
+ Queue<TreeNode> queue = new LinkedList<TreeNode>();
+ queue.add(root);
+ while (!queue.isEmpty()) {
+ TreeNode tempNode = queue.poll();
+ System.out.print(tempNode.val + " ");
+
+ if (tempNode.left != null) {
+ queue.add(tempNode.left);
+ }
+
+ if (tempNode.right != null) {
+ queue.add(tempNode.right);
+ }
+ }
+ }
+
+ private static void flatten(TreeNode root) {
+ if (root == null)
+ return;
+
+ if (root.left == null && root.right == null)
+ return;
+
+ flatten(root.left);
+ flatten(root.right);
+
+ TreeNode temp = root.right;
+ root.right = root.left;
+ root.left = null;
+ TreeNode anotherTemp = root.right;
+
+ while (anotherTemp != null && anotherTemp.right != null) {
+ anotherTemp = anotherTemp.right;
+ }
+
+ if (anotherTemp != null) {
+ anotherTemp.right = temp;
+ }
+
+ if (anotherTemp == null) {
+ root.right = temp;
+ }
+ }
+}
+
+class TreeNode {
+ int val;
+ TreeNode left;
+ TreeNode right;
+
+ TreeNode() {
+ }
+
+ TreeNode(int val) {
+ this.val = val;
+ }
+
+ TreeNode(int val, TreeNode left, TreeNode right) {
+ this.val = val;
+ this.left = left;
+ this.right = right;
+ }
+}
\ No newline at end of file
diff --git a/to be committed/GenerateParentheses.java b/to be committed/GenerateParentheses.java
new file mode 100644
index 0000000..eb653c8
--- /dev/null
+++ b/to be committed/GenerateParentheses.java
@@ -0,0 +1,25 @@
+package com.mckinsey.engage.app.apis.mappings;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class GenerateParentheses {
+ public static void main(String[] args) {
+ LinkedList<String> result = new LinkedList<>();
+ generate(result, "", 3, 0, 0);
+ System.out.println(result);
+ }
+
+ private static void generate(List<String> result, String parentheses, int halfSize, int openingBraces, int closingBraces) {
+ if (parentheses.length() == halfSize * 2) {
+ result.add(parentheses);
+ return;
+ }
+ if (openingBraces < halfSize) {