CodingHumans

Coding Problems and Solutions

CH CodingHumans ·~ min read
Coding problems and solutions hub - CodingHumans

All coding problem solutions on CodingHumans, grouped by platform and series: HackerRank, TCS CodeVita, LeetCode, Google Code Jam, HackerEarth and Codeforces, plus data structure tutorials. Each solution explains the approach before the code.

Tip: try each problem yourself for at least 20 minutes before reading the solution. When you do read it, focus on the idea and the complexity, then close the page and write the code again from scratch.
30 Days of CodeHackerRank JavaTCS CodeVitaLeetCodeGoogle Code JamHackerEarth and CodeforcesData Structure Tutorials

HackerRank 30 Days of Code

  1. Day 0: HackerRank 30 Days Of Code Solution by CodingHumans | Hello, World. |
  2. Day 1: HackerRank 30 Days Of Code Solution by CodingHumans | Data Types
  3. Day 2: HackerRank 30 Days Of Code Solution by CodingHumans |Operators |
  4. Day 3: HackerRank 30 Days Of Code Solution by CodingHuman | Intro to Conditional Statements |
  5. Day 4: HackerRank 30 Days Of Code Solution by CodingHumans | Class vs. Instance |
  6. Day 5: HackerRank 30 Days Of Code Solution By CodingHumans | Loops |
  7. Day 6: HackerRank 30 Days Of Code Solution By CodingHumans | Let's Review |
  8. Day 7: HackerRank 30 Days Of Code Solution By CodingHumans | Arrays |
  9. Day 8: HackerRank 30 Days Of Code Solution By CodingHumans | Dictionaries and Maps |
  10. Day 9: HackerRank 30 Days Of Code Solution By CodingHumans | Recursion 3 |
  11. Day 10: HackerRank 30 Days Of Code Solution By CodingHumans | Binary Numbers |
  12. Day 11: HackerRank 30 Days Of Code Solution By CodingHumans | 2D Arrays |
  13. Day 12: HackerRank 30 Days Of Code Solution By CodingHumans | Inheritance |
  14. Day 13: HackerRank 30 Days Of Code Solution By CodingHumans | Abstract Classes |
  15. Day 14: HackerRank 30 Days Of Code Solution By CodingHumans | Scope |
  16. Day 15: HackerRank 30 Days Of Code Solution By CodingHumans | Linked List |
  17. Day 16: HackerRank 30 Days Of Code Solution By CodingHumans | Exceptions - String to Integer |
  18. Day 17: HackerRank 30 Days Of Code Solution By CodingHumans | More Exceptions |
  19. Day 18: HackerRank 30 Days Of Code Solution By CodingHumans | Queues and Stacks |
  20. Day 19: HackerRank 30 Days Of Code Solution by CodingHumans | Interfaces |
  21. Day 20: HackerRank 30 Days Of Code Solution by CodingHumans | Sorting |
  22. Day 21: HackerRank 30 Days Of Code Solution by CodingHumans | Generics |
  23. Day 22: HackerRank 30 Days Of Code Solution by CodingHumans | Binary Search Trees |
  24. Day 24:HackerRank 30 Days Of Code Solution by CodingHumans | More Linked Lists |
  25. Day 25: HackerRank 30 Days Of Code Solution by CodingHumans | Running Time and Complexity |
  26. Day 26: HackerRank 30 Days Of Code Solution by CodingHumans | Nested Logics |
  27. Day 27: HackerRank 30 Days Of Code Solution by CodingHumans | Testing |
  28. Day 28: HackerRank 30 Days Of Code Solution by CodingHumans | RegEx, Patterns, and Intro to Databases |
  29. Day 29: HackerRank 30 Days Of Code Solution by CodingHumans | Bitwise AND

HackerRank Java and Problem Solving

  1. Andrew and COVID | HackerRank Solution by CodingHumans |
  2. Find Digits | HackerRank Solutions By CodingHumans | Problem Solving Algorithms
  3. Java 1D Array | HackerRank Solution By CodingHumans |
  4. Java BigDecimal | HackerRank Solution By CodingHumans |
  5. Java Currency Formatter | HackerRank Solution By CodingHumans |
  6. Java Date and Time | HackerRank Solution By CodingHumans |
  7. Java If-Else | HackerRank solution by CodingHumans |
  8. Java Loops I | HackerRank Solution By CodingHumans |
  9. Java Loops II | HackerRank Solution By CodingHumans |
  10. Java Output Formatting | HackerRank Solution By CodingHumans |
  11. Java Primality Test | HackerRank Solution By CodingHumans |
  12. Java Regex | HackerRank Solution By CodingHumans |
  13. Java Regex 2 - Duplicate | HackerRank Solution By CodingHumans |
  14. Java Stdin and Stdout I | HackerRank Solution by CodingHumans |
  15. Java Stdin and Stdout II | HackerRank Solution By CodingHumans |
  16. Java String Tokens | HackerRank Solution By CodingHumans |
  17. Java Substring Comparisons | HackerRank Solution By CodingHumans |
  18. Pattern Syntax Checker | HackerRank Solution By CodingHumans |
  19. Welcome to Java! | HackerRank Solution By CodingHumans |

TCS CodeVita

  1. Codekart | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  2. Constellation | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  3. Count Pairs | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  4. Critical Planets | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  5. Death Battle | TCS MockVIta 2 2020 | By CodingHumans |
  6. Diet Plan | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  7. Digit Pairs | TCS MockVIta 2 2020 | By CodingHumans |
  8. Dole Out Cadbury | TCS MockVIta 2 2020 | By CodingHumans |
  9. Fill The Cube | TCS Codevita 9 Solution Zone 2 2020 | CodingHumans
  10. Grooving Monkeys | TCS MockVIta 2 2020 | By CodingHumans |
  11. Hedger | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  12. Lift | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  13. Minimize The Sum | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  14. Minimum Gifts | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  15. Number Distancing | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  16. Petrol Pump |TCS MockVIta 2 2020 | By CodingHumans |
  17. Prime Time Again | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  18. Railway Station | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  19. Single Lane Highway | TCS Codevita 9 Solution Zone 2 2020 | CodingHumans
  20. SudoKube | TCS CodeVita 9 Solution ( Zone 1 ) 2020 | By CodingHumans |
  21. Swayamvar | TCS MockVita 2 2020 | By CodingHumans

LeetCode

  1. Bulb Switcher IV | LeetCode Problems And Solution | CodingHumans |
  2. Design HashSet | LeetCode Problems And Solution | CodingHumans |
  3. Detect Capital | LeetCode Problems And Solution | CodingHumans |
  4. Find Lucky Integer in an Array | | LeetCode Problems And Solution | CodingHumans |
  5. LeetCode Kth Largest Element in an Array Solution | CodingHumans |
  6. LeetCode Thousand Separator Solution | CodingHumans |
  7. Number of Good Leaf Nodes Pairs | LeetCode Problems And Solution | CodingHumans |
  8. Shuffle String | LeetCode Problems And Solution | CodingHumans |
  9. String Compression II | LeetCode Problems And Solution | CodingHumans |

Google Code Jam

  1. Esab Atad | Google Code Jam 2020 | Problems Overview & Solutions |
  2. Nesting Depth | Google Code Jam 2020 | Problems Overview & Solutions |
  3. Parenting Partnering Returns | Google Code Jam 2020 | Problems Overview & Solutions |
  4. Vestigium | Google Code Jam 2020 | Problems Overview & Solutions |

HackerEarth and Codeforces

  1. Brick Game | HackerEarth Programming Problems and Solutions by CodingHumans |
  2. CodeForces Global Round 10 Questions | Coding Problems | CodingHumans |
  3. Cost of balloons | HackerEarth Programming Problems and Solutions by CodingHumans |
  4. Lift queries | HackerEarth Programming Problems and Solutions by CodingHumans |

Other coding problems

  1. C++ program to check if a number is P Smooth
  2. C++ program to implement Stack using Two Queues | CodingHumans |
  3. C++ Queue Implementation using Two Stacks | CodingHumans |
  4. Factorial of Large Numbers 96, 97 , 98 , 100 ... | CodingHumans |
  5. Lexicographically Ordering of Strings in Java
  6. Powers Of 2 | Coding Problems In Java |
  7. Prime Number of Set Bits Solution | CodingHumans |

Data structure and algorithm tutorials

  1. Analysis of Algorithms - CodingHumans
  2. Finding Nth Fibonacci Number using Dynamic Programming ( Top Down DP )
  3. Tree Traversal (Inorder, Preorder and Postorder) in Java
  4. Finding the maximum node in a Binary Tree - Two methods ( Java )

More practice on CodingHumans

MCQ Practice for Computer Science | Interview Preparation Hub | UPSC Prelims Practice Hub

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