Problems

1 – 31 of 31

Problem Title Likes Solvers Difficulty

Problem 45496. Ordered pairs of integers (I, J).

Created by: Prasad Reddy

Tags permutations, sum of numbers

Problem 45495. Number of o rderd pairs of integers (I,J) that can be formed.

Created by: Prasad Reddy

Tags permutations, sum of numbers

Problem 58653. Alternate Arrangement

Created by: Sneha

Tags math, permutations

Problem 43079. Check if two matrices are permutations of each other

Created by: Mohammad Haghighat

Tags math, sorting, matrix manipulation

Problem 51820. Count unique orderings of vertices of a polygon

Created by: ChrisR

Tags combinatorics, permutations, sequence

Problem 43073. Check if a matrix is a palindrome in all directions

Created by: Mohammad Haghighat

Tags math, matrices, matrix manipulation

106

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 55280. Count estrangements

Created by: ChrisR

Tags permutations, arrangements, partner

Problem 46037. Count alternating permutations

Created by: ChrisR

Tags permutations, zigzag

Problem 19. Swap the first and last columns

Created by: Cody Team

Tags math, matlab 101, permutations

111

21004

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

Created by: Richard Zapor

Tags permutations, games, rubik

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

Created by: ChrisR

Tags permutations, modular arithmetic, card trick

Problem 154. Reverse Boggle

Created by: @bmtran (Bryant Tran)

Tags boggle, word game, solver

Problem 56250. Counting Permutations

Created by: Dyuman Joshi

Tags permutations, numbers, number theory

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

Created by: ChrisR

Tags permutations, modular arithmetic, card trick

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

Problem 56448. nth permutation of 11...100...0

Created by: Scott Stetson

Tags combinatorics, permutations

Problem 42494. Which permutation is it?

Created by: Jan Orwat

Tags indexing, permutations

Problem 42495. N-th permutation.

Created by: Jan Orwat

Tags indexing, permutations

Problem 44502. Anyone for tennis? Your chances of winning a (standard) game

Created by: David Verrelli

Tags permutations, probability, tennis

Problem 44503. Anyone for tennis? Your chances of winning a tie-break game

Created by: David Verrelli

Tags permutations, probability, tennis

1 – 31 of 31

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Problems

Problem 45496. Ordered pairs of integers (I, J).

Problem 45495. Number of o rderd pairs of integers (I,J) that can be formed.

Problem 58653. Alternate Arrangement

Problem 43079. Check if two matrices are permutations of each other

Problem 51820. Count unique orderings of vertices of a polygon

Problem 43073. Check if a matrix is a palindrome in all directions

Problem 43072. Check if a rotated array was originally sorted

Problem 51466. List prime anagrams of a number

Problem 2394. Permutation

Problem 54625. Exhaust all possible logical vectors

Problem 1649. Magic - Faro Shuffle

Problem 55280. Count estrangements

Problem 46037. Count alternating permutations

Problem 19. Swap the first and last columns

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

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

Problem 2324. GJam 2014 Rd 1c: Train Cars

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

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

Problem 154. Reverse Boggle

Problem 56250. Counting Permutations

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

Problem 604. Next lexicographic - permutation

Problem 1388. Numbered lottery balls into cells

Problem 56448. nth permutation of 11...100...0

Problem 42494. Which permutation is it?

Problem 42495. N-th permutation.

Problem 44502. Anyone for tennis? Your chances of winning a (standard) game

Problem 44503. Anyone for tennis? Your chances of winning a tie-break game