Day-2 (Solution)
Delete Node in a Linked List
#237
Algorithm: linkedList
Solution: https://gist.github.com/lavakush-m-tiwari/9543235d209163ce605e84bc9800be62
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Delete Node in a Linked List
#237
Algorithm: linkedList
Solution: https://gist.github.com/lavakush-m-tiwari/9543235d209163ce605e84bc9800be62
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LeetCode
Delete Node in a Linked List - LeetCode
Can you solve this real interview question? Delete Node in a Linked List - There is a singly-linked list head and we want to delete a node node in it.
You are given the node to be deleted node. You will not be given access to the first node of head.
All…
You are given the node to be deleted node. You will not be given access to the first node of head.
All…
Day-3
Reverse Linked List
#206
Algorithm: Linked List, Recursion
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Reverse Linked List
#206
Algorithm: Linked List, Recursion
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LeetCode
Reverse Linked List - LeetCode
Can you solve this real interview question? Reverse Linked List - Given the head of a singly linked list, reverse the list, and return the reversed list.
Example 1:
[https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg]
Input: head = [1,2,3,4…
Example 1:
[https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg]
Input: head = [1,2,3,4…
Day-3 (Solution)
Reverse Linked List
#206
Algorithm: Linked List, Recursion
Solution: https://gist.github.com/lavakush-m-tiwari/50a56ed4395866baf3c0709464c38baa
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Reverse Linked List
#206
Algorithm: Linked List, Recursion
Solution: https://gist.github.com/lavakush-m-tiwari/50a56ed4395866baf3c0709464c38baa
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LeetCode
Reverse Linked List - LeetCode
Can you solve this real interview question? Reverse Linked List - Given the head of a singly linked list, reverse the list, and return the reversed list.
Example 1:
[https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg]
Input: head = [1,2,3,4…
Example 1:
[https://assets.leetcode.com/uploads/2021/02/19/rev1ex1.jpg]
Input: head = [1,2,3,4…
Day-4
Remove Nth Node From End of List
#19
Algorithm: linkedList, two pointer
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Remove Nth Node From End of List
#19
Algorithm: linkedList, two pointer
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LeetCode
Remove Nth Node From End of List - LeetCode
Can you solve this real interview question? Remove Nth Node From End of List - Given the head of a linked list, remove the nth node from the end of the list and return its head.
Example 1:
[https://assets.leetcode.com/uploads/2020/10/03/remove_ex1.jpg]…
Example 1:
[https://assets.leetcode.com/uploads/2020/10/03/remove_ex1.jpg]…
Day-4 (Solution)
Remove Nth Node From End of List
#19
Algorithm: linkedList, two pointer
Solution: https://gist.github.com/lavakush-m-tiwari/4993f2214140fb9177281f482d30905a
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Remove Nth Node From End of List
#19
Algorithm: linkedList, two pointer
Solution: https://gist.github.com/lavakush-m-tiwari/4993f2214140fb9177281f482d30905a
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LeetCode
Remove Nth Node From End of List - LeetCode
Can you solve this real interview question? Remove Nth Node From End of List - Given the head of a linked list, remove the nth node from the end of the list and return its head.
Example 1:
[https://assets.leetcode.com/uploads/2020/10/03/remove_ex1.jpg]…
Example 1:
[https://assets.leetcode.com/uploads/2020/10/03/remove_ex1.jpg]…
Day-5
Reverse Linked List II
#92
Algorithm: linkedList
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Reverse Linked List II
#92
Algorithm: linkedList
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LeetCode
Reverse Linked List II - LeetCode
Can you solve this real interview question? Reverse Linked List II - Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of the list from position left to position right, and return the reversed list.…
Day-5 (Solution)
Reverse Linked List II
#92
Algorithm: linkedList, two pointer
Solution: https://gist.github.com/lavakush-m-tiwari/6e735181779b6ec01e1339f163596630
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Reverse Linked List II
#92
Algorithm: linkedList, two pointer
Solution: https://gist.github.com/lavakush-m-tiwari/6e735181779b6ec01e1339f163596630
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LeetCode
Reverse Linked List II - LeetCode
Can you solve this real interview question? Reverse Linked List II - Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of the list from position left to position right, and return the reversed list.…
Day-6
Add Two Numbers
#2
Algorithm: LinkedList, Math, Recursion
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Add Two Numbers
#2
Algorithm: LinkedList, Math, Recursion
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LeetCode
Add Two Numbers - LeetCode
Can you solve this real interview question? Add Two Numbers - You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes contains a single digit. Add the two numbers and…
Day-6(Solution)
Add Two Numbers
#2
Algorithm: LinkedList, Math, Recursion
Solution: https://gist.github.com/lavakush-m-tiwari/8e0e39ee8e87cf7d075d73fe1b2f3391
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Add Two Numbers
#2
Algorithm: LinkedList, Math, Recursion
Solution: https://gist.github.com/lavakush-m-tiwari/8e0e39ee8e87cf7d075d73fe1b2f3391
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LeetCode
Add Two Numbers - LeetCode
Can you solve this real interview question? Add Two Numbers - You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes contains a single digit. Add the two numbers and…
Day-7
Swap Nodes in Pairs
#24
Algorithm: LinkedList, Recursion
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Swap Nodes in Pairs
#24
Algorithm: LinkedList, Recursion
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LeetCode
Swap Nodes in Pairs - LeetCode
Can you solve this real interview question? Swap Nodes in Pairs - Given a linked list, swap every two adjacent nodes and return its head. You must solve the problem without modifying the values in the list's nodes (i.e., only nodes themselves may be changed.)…
Day-7 (Solution)
Swap Nodes in Pairs
#24
Algorithm: LinkedList, Recursion
Solution: https://gist.github.com/lavakush-m-tiwari/5d9107cdedff9cbd8b38c305439353ee
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Swap Nodes in Pairs
#24
Algorithm: LinkedList, Recursion
Solution: https://gist.github.com/lavakush-m-tiwari/5d9107cdedff9cbd8b38c305439353ee
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LeetCode
Swap Nodes in Pairs - LeetCode
Can you solve this real interview question? Swap Nodes in Pairs - Given a linked list, swap every two adjacent nodes and return its head. You must solve the problem without modifying the values in the list's nodes (i.e., only nodes themselves may be changed.)…
Day-8
Copy List with Random Pointer
#138
Algorithm: LinkedList, HashTable
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Copy List with Random Pointer
#138
Algorithm: LinkedList, HashTable
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LeetCode
Copy List with Random Pointer - LeetCode
Can you solve this real interview question? Copy List with Random Pointer - A linked list of length n is given such that each node contains an additional random pointer, which could point to any node in the list, or null.
Construct a deep copy [https://…
Construct a deep copy [https://…
Day-8 (Solution)
Copy List with Random Pointer
#138
Algorithm: LinkedList, HashTable
Solution: https://gist.github.com/lavakush-m-tiwari/0ed0f4ca704415a65d4243f96b20f846
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Copy List with Random Pointer
#138
Algorithm: LinkedList, HashTable
Solution: https://gist.github.com/lavakush-m-tiwari/0ed0f4ca704415a65d4243f96b20f846
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LeetCode
Copy List with Random Pointer - LeetCode
Can you solve this real interview question? Copy List with Random Pointer - A linked list of length n is given such that each node contains an additional random pointer, which could point to any node in the list, or null.
Construct a deep copy [https://…
Construct a deep copy [https://…
Day-9
Partition List
#86
Algorithm: LinkedList, Two Pointer
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Partition List
#86
Algorithm: LinkedList, Two Pointer
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LeetCode
Partition List - LeetCode
Can you solve this real interview question? Partition List - Given the head of a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x.
You should preserve the original relative order of the…
You should preserve the original relative order of the…
Day-9 (Solution)
Partition List
#86
Algorithm: LinkedList, Two Pointer
Solution: https://gist.github.com/lavakush-m-tiwari/02fceae370cbbb8701671ac7ded27fcd
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Partition List
#86
Algorithm: LinkedList, Two Pointer
Solution: https://gist.github.com/lavakush-m-tiwari/02fceae370cbbb8701671ac7ded27fcd
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LeetCode
Partition List - LeetCode
Can you solve this real interview question? Partition List - Given the head of a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x.
You should preserve the original relative order of the…
You should preserve the original relative order of the…
Day-10
Linked List Cycle
#141
Algorithm: LinkedList, Two Pointer , HashTable
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Linked List Cycle
#141
Algorithm: LinkedList, Two Pointer , HashTable
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LeetCode
Linked List Cycle - LeetCode
Can you solve this real interview question? Linked List Cycle - Given head, the head of a linked list, determine if the linked list has a cycle in it.
There is a cycle in a linked list if there is some node in the list that can be reached again by continuously…
There is a cycle in a linked list if there is some node in the list that can be reached again by continuously…
Day-10
Linked List Cycle
#141
Algorithm: LinkedList, Two Pointer , HashTable
Solution: https://gist.github.com/lavakush-m-tiwari/932ca2d6e72c93708e59a9417444ea94
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Linked List Cycle
#141
Algorithm: LinkedList, Two Pointer , HashTable
Solution: https://gist.github.com/lavakush-m-tiwari/932ca2d6e72c93708e59a9417444ea94
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LeetCode
Linked List Cycle - LeetCode
Can you solve this real interview question? Linked List Cycle - Given head, the head of a linked list, determine if the linked list has a cycle in it.
There is a cycle in a linked list if there is some node in the list that can be reached again by continuously…
There is a cycle in a linked list if there is some node in the list that can be reached again by continuously…
Day-11
LRU Cache
#146
Algorithm: LinkedList, Two Pointer
Related Video: https://www.youtube.com/watch?v=akFRa58Svug
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LRU Cache
#146
Algorithm: LinkedList, Two Pointer
Related Video: https://www.youtube.com/watch?v=akFRa58Svug
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LeetCode
LRU Cache - LeetCode
Can you solve this real interview question? LRU Cache - Design a data structure that follows the constraints of a Least Recently Used (LRU) cache [https://en.wikipedia.org/wiki/Cache_replacement_policies#LRU].
Implement the LRUCache class:
* LRUCache(int…
Implement the LRUCache class:
* LRUCache(int…
Day-11 (Solution)
LRU Cache
#146
Algorithm: LinkedList, Two Pointer
Related Video: https://www.youtube.com/watch?v=akFRa58Svug
Solution: https://gist.github.com/lavakush-m-tiwari/efe39f454db09d9914da673cbbe88e74
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LRU Cache
#146
Algorithm: LinkedList, Two Pointer
Related Video: https://www.youtube.com/watch?v=akFRa58Svug
Solution: https://gist.github.com/lavakush-m-tiwari/efe39f454db09d9914da673cbbe88e74
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LeetCode
LRU Cache - LeetCode
Can you solve this real interview question? LRU Cache - Design a data structure that follows the constraints of a Least Recently Used (LRU) cache [https://en.wikipedia.org/wiki/Cache_replacement_policies#LRU].
Implement the LRUCache class:
* LRUCache(int…
Implement the LRUCache class:
* LRUCache(int…
Day-12
Design Browser History
#1472
Algorithm: LinkedList, stack, Design , Doubly linked li
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Design Browser History
#1472
Algorithm: LinkedList, stack, Design , Doubly linked li
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LeetCode
Design Browser History - LeetCode
Can you solve this real interview question? Design Browser History - You have a browser of one tab where you start on the homepage and you can visit another url, get back in the history number of steps or move forward in the history number of steps.
Implement…
Implement…