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21 Days DSA Challenge to solve top tech companies interview problems, video solutions available on my YouTube Channel - https://yt.openinapp.co/shumbul

shumbularifa.com/challenge
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Day 1
Day 1
 
 
Day 10
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Day 12
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Day 13
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Day 14
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Day 15
Day 15
 
 
Day 16
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Day 17
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Day 18
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Day 19
Day 19
 
 
Day 2
Day 2
 
 
Day 21
Day 21
 
 
Day 3
Day 3
 
 
Day 4
Day 4
 
 
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Day 7
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Day 8
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Day 9
Day 9
 
 
Deepak
Deepak
 
 
0. Contributing.md
0. Contributing.md
 
 
1. Count pairs with given sum.cpp
1. Count pairs with given sum.cpp
 
 
10. Nth Fibonacci Number.cpp
10. Nth Fibonacci Number.cpp
 
 
11. Find the number of islands.cpp
11. Find the number of islands.cpp
 
 
12. Word Ladded 1.cpp
12. Word Ladded 1.cpp
 
 
13. Overlapping Intervals.cpp
13. Overlapping Intervals.cpp
 
 
14. Reverse a linked list.cpp
14. Reverse a linked list.cpp
 
 
15. Merge Sort for Linked List.cpp
15. Merge Sort for Linked List.cpp
 
 
16. Spirally traversing a matrix.cpp
16. Spirally traversing a matrix.cpp
 
 
17. Container With Most Water.cpp
17. Container With Most Water.cpp
 
 
18. Parenthesis Checker.cpp
18. Parenthesis Checker.cpp
 
 
19. Longest consecutive subsequence.cpp
19. Longest consecutive subsequence.cpp
 
 
2. Remove character.cpp
2. Remove character.cpp
 
 
20. Generate Parentheses.cpp
20. Generate Parentheses.cpp
 
 
21. Phone directory.cpp
21. Phone directory.cpp
 
 
3. Buy Stock 2.cpp
3. Buy Stock 2.cpp
 
 
4. Mirror Tree.cpp
4. Mirror Tree.cpp
 
 
5. Lowest Common Ancestor in a Binary Tree.cpp
5. Lowest Common Ancestor in a Binary Tree.cpp
 
 
6. Search in a matrix.cpp
6. Search in a matrix.cpp
 
 
7. K largest elements.cpp
7. K largest elements.cpp
 
 
8. Right View of Binary Tree.cpp
8. Right View of Binary Tree.cpp
 
 
9. Triangle Path Sum.cpp
9. Triangle Path Sum.cpp
 
 
README.md
README.md
 
 

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21-Days-DSA-Challenge

For video solution and more, bookmark my website - https://www.shumbularifa.com/

Contributing guidelines - Contributing.md

21 Days DSA Challenge - Problems Table

Day Problem Name Solution Video Problem Link
Day 1 Count pairs with given sum Solution Video 1 Problem Link 1
Day 2 Remove character Solution Video 2 Problem Link 2
Day 3 Buy Stock 2 Solution Video 3 Problem Link 3
Day 4 Mirror Tree Solution Video 4 Problem Link 4
Day 5 Lowest Common Ancestor in a Binary Tree Solution Video 5 Problem Link 5
Day 6 Search in a matrix Solution Video 6 Problem Link 6
Day 7 K largest elements Solution Video 7 Problem Link 7
Day 8 Right View of Binary Tree Solution Video 8 Problem Link 8
Day 9 Triangle path sum Solution Video 9 Problem Link 9
Day 10 Nth Fibonacci number Solution Video 10 Problem Link 10
Day 11 Find the number of islands Solution Video 11 Problem Link 11
Day 12 Word Ladder 1 Solution Video 12 Problem Link 12
Day 13 Overlapping Intervals Solution Video 13 Problem Link 13
Day 14 Reverse a linked list Solution Video 14 Problem Link 14
Day 15 Merge Sort for Linked List Solution Video 15 Problem Link 15
Day 16 Spirally traversing a matrix Solution Video 16 Problem Link 16
Day 17 Container With Most Water Solution Video 17 Problem Link 17
Day 18 Parenthesis Checker Solution Video 18 Problem Link 18
Day 19 Longest consecutive subsequence Solution Video 19 Problem Link 19
Day 20 Generate Parentheses Solution Video 20 Problem Link 20
Day 21 Phone directory Solution Video 21 Problem Link 21

Learn from me

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21 Days DSA Challenge to solve top tech companies interview problems, video solutions available on my YouTube Channel - https://yt.openinapp.co/shumbul

shumbularifa.com/challenge

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