Week 1 problems solutions

1. Plus Minus Problem Solution – HackerRank – All Language
2. Mini-Max Sum Problem Solution – HackerRank – All Language
3. Time Conversion Problem Solution – HackerRank – All Language
4. Sparse Arrays Problem Solution – HackerRank – All Language
5. Lonely Integer Problem Solution – HackerRank – All Language
6. Flipping bits Problem Solution – HackerRank – All Language
7. Diagonal Difference Problem Solution – HackerRank – All Language
8. Counting Sort 1 Problem Solution – HackerRank – All Language
9. Pangrams Problem Solution – HackerRank – All Language
10. Permuting Two Arrays Problem Solution – HackerRank – All Language
11. Subarray Division 1 Problem Solution – HackerRank – All Language
12. XOR Strings 2 Problem Solution – HackerRank – All Language

Week 2 problems solutions

1. Sales by Match Problem Solution – HackerRank – All Language
2. Zig Zag Sequence Problem Solution – HackerRank – All Language
3. Drawing Book Problem Solution – HackerRank – All Language
4. Tower Breakers Problem Solution – HackerRank – All Language
5. Caesar Cipher Problem Solution – HackerRank – All Language
6. Max-Min Problem Solution – HackerRank – All Language
7. Dynamic Array Problem Solution – HackerRank – All Language
8. Grid Challenge Problem Solution – HackerRank – All Language
9. Prime Dates Problem Solution – HackerRank – All Language
10. Sherlock and Array Problem Solution – HackerRank – All Language
11. Recursive Digit Sum Problem Solution – HackerRank – All Language
12. Counter game Problem Solution – HackerRank – All Language
13. Sum vs XOR Problem Solution – HackerRank – All Language

Week 3 problems solutions

1. The Bomberman Game Problem Solution – HackerRank – All Language
2. New Year Chaos Problem Solution – HackerRank – All Language
3. Sherlock and the Valid String Problem Solution – HackerRank – All Language
4. Climbing the Leaderboard Problem Solution – HackerRank – All Language
5. Reverse a linked list Problem Solution – HackerRank – All Language
6. Reverse a doubly linked list Problem Solution – HackerRank – All Language
7. Insert a node at a specific position in a linked list Problem Solution – HackerRank – All Language
8. Merge two sorted linked lists Problem Solution – HackerRank – All Language
9. Ice Cream Parlor Problem Solution – HackerRank – All Language
10. Queue using Two Stacks Problem Solution – HackerRank – All Language
11. Balanced Brackets Problem Solution – HackerRank – All Language
12. Waiter Problem Solution – HackerRank – All Language
13. Simple Text Editor Problem Solution – HackerRank – All Language

Week 4 problems solutions

1. Equal Stacks Problem Solution – HackerRank – All Language
2. The Maximum Subarray Problem Solution – HackerRank – All Language
3. Lego Blocks Problem Solution – HackerRank – All Language
4. QHEAP1 Problem Solution – HackerRank – All Language
5. Jesse and Cookies Problem Solution – HackerRank – All Language
6. Radio Transmitters Problem Solution – HackerRank – All Language
7. Queries with Fixed Length Problem Solution – HackerRank – All Language
8. Array Manipulation Problem Solution – HackerRank – All Language
9. Highest Value Palindrome Problem Solution – HackerRank – All Language
10. Lily’s Homework Problem Solution – HackerRank – All Language
11. Tree: Preorder Traversal Problem Solution – HackerRank – All Language
12. Tree: Huffman Decoding Problem Solution – HackerRank – All Language
13. Binary Search Tree: Lowest Common Ancestor Problem Solution – HackerRank – All Language
14. No Prefix Set Problem Solution – HackerRank – All Language
15. Castle on the Grid Problem Solution – HackerRank – All Language
16. Roads and Libraries Problem Solution – HackerRank – All Language

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