Problem 42494. Which permutation is it?
Let write some permutations of positive integers.
1: 1 2 3 4 5 6 ... 2: 2 1 3 4 ... 3: 1 3 2 4 ... 4: 2 3 1 4 ... 5: 3 1 2 4 ... 6: 3 2 1 4 ... 25: 1 2 3 5 4 ... 120: 5 4 3 2 1 6 7 ...
Given a permutation of integers in range 1:n, return it's index following above pattern.
See also: 42495
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers31
Suggested Problems
-
Sum of first n terms of a harmonic progression
402 Solvers
-
200 Solvers
-
85 Solvers
-
Digit concentration in Champernowne's constant
120 Solvers
-
Is this a valid Tic Tac Toe State?
117 Solvers
More from this Author40
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!