Level1

Contents

# Sr	Table Of Contents
01	RecursionAndBacktracking
02	Stacks
03	Queues
04	Linked List
05	Generic Tree
06	Binary Tree
07	Binary Search Tree
08	Hash & Heap
09	Graph
10	DP
11	Time Complexity

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RecursionAndBacktracking PDF

Problem	Java Solution	todo
Print Decreasing Easy	Solution	- [x] completed? - [ ] todo
Print Increasing Easy	Solution	- [ ] todo
Print Increasing Decreasing Easy	Solution	- [] todo
Factorial Easy	Solution	- [] todo
Power-linear Easy	Solution	- [] todo
Power-logarithmic Easy	Solution	- [] todo
Print Zigzag Easy	Solution	- [] todo
Tower Of Hanoi	Solution	- [] todo

Problem	Java Solution
Display Array Easy	Solution
Display Array In Reverse Easy	Solution
Max Of An Array Easy	Solution
First Index Easy	Solution
Last Index Easy	Solution
All Indices Of Array	Solution

Problem	Java Solution
Get Subsequence Easy	Solution
Get Kpc Easy	Solution
Get Stair Paths Easy	Solution
Get Maze Paths Easy	Solution
Get Maze Path With Jumps	Solution

Problem	Java Solution
Print Subsequence Easy	Solution
Print Kpc Easy	Solution
Print Stair Paths Easy	Solution
Print Maze Paths Easy	Solution
Print Maze Paths With Jumps Easy	Solution
Print Permutations Easy	Solution
Print Encodings	Solution

Problem	Java Solution
Flood Fill Easy	Solution
Target Sum Subsets Easy	Solution
N Queens(subset approach)	Solution
N Queens(level option approach)	Solution
Knights Tour Easy	Solution

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Stacks PDF

Problem	Java Solution
Duplicate Bracket	Solution
Balanced Bracket	Solution
Next Greater Element to right	Solution
Stock span	Solution
Largest Are Histogram	Solution
Sliding Window Maximam	Solution
Infix evaluation	Solution
infix conversion	Solution
Postfix evaluation and conversion	Solution
Prefix Evaluation and conversion	Solution
Celebrity Problem	Solution
Merge Overlapping interval	Solution
Smallest Number Following pattern	Solution
Normal stack	Solution
Dynamic stack	Solution
Minimum Stack -1	Solution
Minimum Stack - constant space	Solution

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Queues PDF

Problem	Java Solution
Normal queue	Solution
Dynamic Queue	Solution
Queue to Stack Adapter- push efficient	Solution
Queue to Stack Adapter- pop efficient	Solution
Stack to Queue Adapter-Add efficient	Solution
Stack to Queue Adapter-Remove efficient	Solution
Two Stacks in an Array	Solution

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Linked List PDF PDF2

Problem	Java Solution
Add Last In Linked List	Solution
Display A Linkedlist	Solution
Remove First In Linkedlist	Solution
Get Value In Linked List	Solution
Add First In Linked List	Solution
Add At Index In Linked List	Solution
Remove Last In Linked List	Solution
Remove At Index In Linked List	Solution
Reverse A Linked List (data Iterative)	Solution
Reverse Linked List (pointer Iterative)	Solution
Linked List To Stack Adapter	Solution
Linked List To Queue Adapter	Solution

Problem	Java Solution
Kth Node From End Of Linked List	Solution
Mid Of Linked List	Solution
Merge Two Sorted Linked Lists	Solution
Merge Sort A Linked List	Solution
Remove Duplicates In A Sorted Linked List	Solution
Odd Even Linked List Medium	Solution
K Reverse In Linked List	Solution
Display Reverse (recursive) - Linked List	Solution
Reverse Linked List (pointer - Recursive)	Solution
Is Linked List A Palindrome?	Solution

Problem	Java Solution
Fold A Linked List	Solution
Add Two Linked Lists	Solution
Intersection Point Of Linked Lists	Solution
Copy Linkedlist With Random Pointers	Solution

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Generic Tree PDF PDF2

Problem	Java Solution	Articles
Generic Trees - Introduction And Data Members	Solution	Articles
Generic Tree - Constructor	Solution	Articles
Display A Generic Tree	Solution	Articles
Size Of Generic Tree	Solution	Articles
Maximum In A Generic Tree	Solution	Articles
Height Of A Generic Tree	Solution	Articles

Problem	Java Solution	Articles
Generic Tree - Traversals (pre-order, Post-order)	Solution	Articles
Level-order Of Generic Tree	Solution	Articles
Levelorder Linewise (generic Tree)	Solution	Articles
Levelorder Linewise Zig Zag	Solution	Articles
Level Order Traversals - More Approaches	Solution	Articles

Problem	Java Solution	Articles
Mirror A Generic Tree	Solution	Articles
Remove Leaves In Generic Tree	Solution	Articles
Linearize A Generic Tree	Solution	Articles
Linearize A Generic Tree - Efficient Approach	Solution	Articles

Problem	Java Solution	Articles
Find element In Generic Tree	Solution	Articles
Node To Root Path In Generic Tree	Solution	Articles
Lowest Common Ancestor (generic Tree)	Solution	Articles
Distance Between Two Nodes In A Generic Tree	Solution	Articles

Problem	Java Solution	Articles
Are Trees Similar In Shape	Solution	Articles
Are Trees Mirror In Shape	Solution	Articles
Is Generic Tree Symmetric	Solution	Articles

Problem	Java Solution	Articles
Multisolver For Generic Tree	Solution	Articles
Predecessor And Successor Of An Element	Solution	Articles
Ceil And Floor In Generic Tree	Solution	Articles
Kth Largest Element In Tree	Solution	Articles
Node With Maximum Subtree Sum	Solution	Articles
Diameter Of Generic Tree	Solution	Articles
Iterative Preorder And Postorder Of Generic Tree	Solution	Articles
Iterable And Iterator	Solution	Articles

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Binary Tree PDF PDF2

Problem	Java Solution	Articles
Binary Tree - Introduction And Data Members	Solution	Articles
Binary Tree - Constructor	Solution	Articles
Display A Binary Tree	Solution	Articles
Size, Sum, Maximum And Height Of A Binary Tree	Solution	Articles
Traversals In A Binary Tree	Solution	Articles
Levelorder Traversal Of Binary Tree	Solution	Articles
Iterative Pre, Post And Inorder Traversals Of Binary Tree	Solution	Articles

Problem	Java Solution	Articles
Find And Nodetorootpath In Binary Tree	Solution	Articles
Print K Levels Down	Solution	Articles
Print Nodes K Distance Away	Solution	Articles
Path To Leaf From Root In Range	Solution	Articles

Problem	Java Solution	Articles
Transform To Left-cloned Tree	Solution	Articles
Transform To Normal From Left-cloned Tree	Solution	Articles
Print Single Child Nodes	Solution	Articles
Remove Leaves In Binary Tree	Solution	Articles
Diameter Of A Binary Tree	Solution	Articles
Tilt Of Binary Tree	Solution	Articles

Problem	Java Solution	Articles
Is A Binary Search Tree	Solution	Articles
Is Balanced Tree	Solution	Articles
Largest Bst Subtree	Solution	Articles

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Binary Search Tree PDF PDF2

Problem	Java Solution	Articles
Binary Search Tree - Introduction	Solution
Binary Search Tree - Constructor	Solution
Size, Sum, Max, Min, Find In Bst	Solution
Add Node To Bst	Solution
Replace With Sum Of Larger	Solution
Lca Of Bst	Solution
Print In Range	Solution
Target Sum Pair In Bst	Solution
Target Sum Pair - Bst - Alternate Approaches	Solution
Remove Node From Bst Medium	Solution

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Hash & Heap PDF PDF2

Problem	Java Solution	Articles
Heaps - Introduction And Usage	Solution	Articles
K Largest Elements	Solution	Articles
Sort K-sorted Array	Solution	Articles
Median Priority Queue	Solution	Articles
Merge K Sorted Lists	Solution	Articles
Hashmap - Introduction	Solution	Articles
Highest Frequency Character	Solution	Articles
Get Common Elements - 1	Solution	Articles
Get Common Elements - 2	Solution	Articles
Longest Consecutive Sequence Of Elements	Solution	Articles
Write Priority Queue Using Heap	Solution	Articles
Write Hashmap	Solution	Articles
Efficient Heap Constructor	Solution	Articles
Heap - Comparable V/s Comparator	Solution	Articles

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Graph PDF PDF2

Problem	Java Solution	Articles
Introduction To Graphs And Its Representation	Solution
Has Path?	Solution
Print All Paths	Solution
Multisolver - Smallest, Longest, Ceil, Floor, Kthlargest Path	Solution
Get Connected Components Of A Graph	Solution
Is Graph Connected	Solution
Number Of Islands	Solution
Perfect Friends	Solution
Hamiltonian Path And Cycle	Solution
Knights Tour	Solution
Breadth First Traversal	Solution
Is Graph Cyclic	Solution
Is Graph Bipartite	Solution
Spread Of Infection	Solution
Shortest Path In Weights (dijkstra)	Solution
Minimum Wire Required To Connect All Pcs (prims algo)	Solution
Order Of Compilation	Solution
Iterative Depth First Traversal	Solution
Detect cycle in a directed graph Practice GeeksforGeeks	Solution
Rotting Oranges - LeetCode	Solution
Evaluate Division - LeetCode	Solution
Course Schedule - LeetCode	Solution

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DP PDF PDF2

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TimeComplexity PDF PDF2