Programming Puzzle Solutions

Competitive programming offers a rapid and enriching learning experience by being confronted with problems that diverge from typical day-to-day business demands. It serves as both a personal and intellectual challenge. It's my personal sudoku if you will. In order to keep track, I decided to post the solutions to challenges I participated to — not to spoil the journey for others, but to inspire the pursuit of even more efficient and better approaches to these captivating problems.

Project Euler Solutions

  1. Multiples of 3 and 5
  2. Even Fibonacci numbers
  3. Largest prime factor
  4. Largest palindrome product
  5. Smallest multiple
  6. Sum square difference
  7. 10001st prime
  8. Largest product in a series
  9. Special Pythagorean triplet
  10. Summation of primes
  11. Largest product in a grid
  12. Highly divisible triangular number
  13. Large sum
  14. Longest Collatz sequence
  15. Lattice paths
  16. Power digit sum
  17. Number letter counts
  18. Maximum path sum I
  19. Counting Sundays
  20. Factorial digit sum
  21. Amicable numbers
  22. Names scores
  23. Non-abundant sums
  24. Lexicographic permutations
  25. 1000-digit Fibonacci number
  26. Reciprocal cycles
  27. Quadratic primes
  28. Number spiral diagonals
  29. Distinct powers
  30. Digit fifth powers
  31. Coin sums
  32. Pandigital products
  33. Digit cancelling fractions
  34. Digit factorials
  35. Circular primes
  36. Double-base palindromes
  37. Truncatable primes
  38. Pandigital multiples
  39. Integer right triangles
  40. Champernowne's constant
  41. Pandigital prime
  42. Coded triangle numbers
  43. Sub-string divisibility
  44. Pentagon numbers
  45. Triangular, pentagonal, and hexagonal
  46. Goldbach's other conjecture
  47. Distinct primes factors
  48. Self powers
  49. Prime permutations
  50. Consecutive prime sum
  1. Permuted multiples
  1. Lychrel numbers
  2. Powerful digit sum
  3. Square root convergents
  4. Spiral primes
  5. XOR decryption
  1. Cubic permutations
  2. Powerful digit counts
  3. Odd period square roots
  1. Maximum path sum II
  1. Totient maximum
  1. Ordered fractions
  2. Counting fractions
  1. Path sum: two ways
  1. Square digit chains
  1. Minimal network

CodeSignal Solutions

Codingame Solutions

Easy

Medium

Hard

Very Hard

Clash

Hackerrank Solutions

Mathematics - Algebra

Mathematics - Geometry

Mathematics - Fundamentals

Mathematics - Combinatorics

Mathematics - Number Theory

Algorithms - Bit Manipulation

Algorithms - Implementation

Algorithms - Recursion

Algorithms - Search

SkillValue Solutions

ACM

Spotify Solutions

Misc Solutions