Problem 46037. Count alternating permutations
In an alternating permutation of numbers 1 to n, the numbers are arranged so that they alternately increase and decrease. For example, there are five alternating permutations of the numbers 1, 2, 3, and 4:
1 3 2 4
1 4 2 3
2 3 1 4
2 4 1 3
3 4 1 2
Write a function to count the alternating permutations for a set of n numbers.
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers9
Suggested Problems
-
2230 Solvers
-
Number of 1s in the Binary Representation of a Number
442 Solvers
-
1348 Solvers
-
Rotate input square matrix 90 degrees CCW without rot90
600 Solvers
-
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
216 Solvers
More from this Author269
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!