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Data Structures and Algorithms in Python: DSA Course
โฑ๏ธ 57.0 hours
โญ 4.33
๐ฅ 57,287
๐ Dec 2025
๐ฐ $17.99 โ 100% OFF
https://t.co/WhiIrx9U7G
#PythonDSA #LeetCode #CodingInterview #udemy
LeetCode Problem #283 โ Move Zeroes Fully Solved in Our YouTube Channel | DSA Series Video No. 25!
๐บ Watch Full Video Here: https://t.co/orJGZQK2om
#LeetCode283 #MoveZeroes #DSA #CodingInterview #PlacementPreparation #JavaDSA #PythonDSA #LeetCodeSolutions #GirisTechHub
LeetCode Contest 466 โ Q2
Minimum Operations to Transform String
Solved in contest!
Compared both strings โ tracked mismatches โ calculated ops based on differences
Great mix of string traversal & greedy logic!
#LeetCode #Contest #PythonDSA #DSA #DailyPractice
LeetCode 2 โ Add Two Numbers
Solved: Add two numbers represented as linked lists
Traverse both lists digit by digit โ keep carry
Build new list as result
O(max(m,n)) time, O(1) extra space
Classic linked list + math simulation problem!
#LeetCode #LinkedList #DSA #PythonDSA
LeetCode 160 โ Intersection of Two Linked Lists
Solved: Find node where two linked lists intersect
Used two pointers โ move each to other list after reaching end
They meet at intersection or null
O(n) time, O(1) space
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 3658 โ GCD of Odd and Even Sums
Solved: Find gcd of sum of odd elements & sum of even elements
Traversed array, summed odd & even separately โ gcd(sumOdd, sumEven)
Simple math + array traversal!
#LeetCode #100DaysOfCode #Math #PythonDSA
LeetCode 148 โ Sort List
Solved: Sort a linked list in O(n log n)
Used merge sort โ find mid, sort halves, merge
O(n log n) time, O(1) space (linked list friendly)
Great practice for divide & conquer!
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 877 โ Stone Game
Solved: Predict winner in stone game with optimal play
Mathematical insight โ Alex always wins if piles > 1
No DP needed, just return True
#LeetCode #100DaysOfCode #GameTheory #DSA #PythonDSA
LeetCode 2095 โ Delete the Middle Node of a Linked List
Solved: Delete the middle node in a linked list
Used slow & fast pointers to find middle
Then skipped the middle by adjusting links
O(n) time, O(1) space
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 19 โ Remove Nth Node From End of List
Solved: Remove the nth node from end
Two-pointer approach โ move fast n steps ahead, then move both till fast hits end
Adjust links to skip target node
O(n) time, O(1) space
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 328 โ Odd Even Linked List
Solved: Group all odd-indexed nodes, then even-indexed nodes
Maintained two lists (odd & even) โ connected at the end
O(n) time, O(1) space
Good practice in rearranging linked lists!
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 234 โ Palindrome Linked List
Solved: Check if a linked list is a palindrome
Steps:
Find middle (slow & fast pointers)
Reverse 2nd half of list
Compare first & second half nodes
O(n) time, O(1) space
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 876 โ Middle of the Linked List
Solved: Find middle node of a linked list
Used slow & fast pointers โ when fast hits end, slow is at middle
O(n) time, O(1) space
Clean & elegant pointer trick!
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 142 โ Linked List Cycle II
Solved: Detect cycle and return starting node
Step 1: Use Floydโs Cycle Detection (slow & fast)
Step 2: Once they meet, move one pointer to headโ step both by 1โmeet at cycle start
O(n) time, O(1) space
#LeetCode #LinkedList #DSA #PythonDSA
LeetCode 2396 โ Strictly Palindromic Number
Solved: Check if n is palindromic in every base 2โฆn-2
Trick: No number โฅ 4 can ever be strictly palindromic โ always false
Math observation > brute force!
#LeetCode #100DaysOfCode #Math #PythonDSA
LeetCode 141 โ Linked List Cycle
Solved: Detect cycle in a linked list
Used Floydโs Cycle Detection (slow & fast pointers)
If pointers meet โ cycle exists
O(n) time, O(1) space
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 206 โ Reverse Linked List
Solved: Reverse a singly linked list
Iterative: keep track of prev, curr, next
Re-point https://t.co/eLD2RDaAe3 โ prev until null
Classic linked list must-know!
#LeetCode #100DaysOfCode #LinkedList #DSA #PythonDSA
LeetCode 237 โ Delete Node in a Linked List
Solved: Delete a node (not head) in a singly linked list
Trick: Copy value from next into current node โ skip next
O(1) time, O(1) space
Simple yet clever linked list manipulation!
#LeetCode #100DaysOfCode #LinkedList #PythonDSA
Havenโt posted here for a few daysโฆ but Iโve been solving daily on LeetCode
Getting back to posting solutions again from today
#100DaysOfCode #LeetCode #DSA #PythonDSA
LeetCode Contest Update
Q1. Restore Finishing Order
Submitted in todayโs contest!
Idea: Use given ranks to rebuild correct order by mapping participants back to their positions.
Efficient simulation with array/indexing.
#LeetCode #Contest #100DaysOfCode #DSA #PythonDSA
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