Problems

1 – 21 of 21

Problem Title Likes Solvers Difficulty

Problem 51820. Count unique orderings of vertices of a polygon

Created by: ChrisR

Tags combinatorics, permutations, sequence

Problem 43072. Check if a rotated array was originally sorted

Created by: Mohammad Haghighat

Tags sorting, matrix manipulation, permutations

Problem 51466. List prime anagrams of a number

Created by: ChrisR

Tags primes, permutations, anagram

Problem 46037. Count alternating permutations

Created by: ChrisR

Tags permutations, zigzag

Problem 55280. Count estrangements

Created by: ChrisR

Tags permutations, arrangements, partner

Problem 986. Penny Flipping: Reverse subsets of a sequence of coins until you recover the original configuration

Created by: Everett Rubel

Tags permutations, reverse, flip

Problem 19. Swap the first and last columns

Created by: Cody Team

Tags math, matlab 101, permutations

18221

Problem 154. Reverse Boggle

Created by: @bmtran (Bryant Tran)

Tags boggle, word game, solver

Problem 1393. A (wrong) place for everything, and everything in its (wrong) place

Created by: James

Tags permutations, organization

Problem 1482. Number of cyles and fixed points in a permutation

Created by: G K

Tags math, permutations

Problem 2324. GJam 2014 Rd 1c: Train Cars

Created by: Richard Zapor

Tags string, permutations, gjam

Problem 2325. GJam 2014 Rd 1c: Reordering Train Cars (Large)

Created by: Richard Zapor

Tags permutations, factorial, gjam

Problem 56250. Counting Permutations

Created by: Dyuman Joshi

Tags permutations, numbers, number theory

Problem 51451. Guess the card in Fitch Cheney’s five-card trick

Created by: ChrisR

Tags permutations, modular arithmetic, card trick

Problem 51461. Pass the cards in Fitch Cheney's five-card trick

Created by: ChrisR

Tags permutations, modular arithmetic, card trick

Problem 892. Solve Rubik's Cube - Up to Two Face Moves

Created by: Richard Zapor

Tags permutations, games, rubik

Problem 604. Next lexicographic - permutation

Created by: Muthu Annamalai

Tags combinatorics, permutations

Problem 1388. Numbered lottery balls into cells

Created by: James

Tags permutations, lottery, buckets

1 – 21 of 21

Difficulty Rating

Problem Groups

Difficulty Rating

Problem Groups

Problems

Problem 51820. Count unique orderings of vertices of a polygon

Problem 43072. Check if a rotated array was originally sorted

Problem 51466. List prime anagrams of a number

Problem 54625. Exhaust all possible logical vectors

Problem 2394. Permutation

Problem 1649. Magic - Faro Shuffle

Problem 46037. Count alternating permutations

Problem 55280. Count estrangements

Problem 986. Penny Flipping: Reverse subsets of a sequence of coins until you recover the original configuration

Problem 19. Swap the first and last columns

Problem 154. Reverse Boggle

Problem 1393. A (wrong) place for everything, and everything in its (wrong) place

Problem 1482. Number of cyles and fixed points in a permutation

Problem 2324. GJam 2014 Rd 1c: Train Cars

Problem 2325. GJam 2014 Rd 1c: Reordering Train Cars (Large)

Problem 56250. Counting Permutations

Problem 51451. Guess the card in Fitch Cheney’s five-card trick

Problem 51461. Pass the cards in Fitch Cheney's five-card trick

Problem 892. Solve Rubik's Cube - Up to Two Face Moves

Problem 604. Next lexicographic - permutation

Problem 1388. Numbered lottery balls into cells