Problem 487. Find perfect placement of non-rotating dominoes (easier)

Given a list of ordered pairs, find the order they should be placed in a line, such that the sum of the absolute values of the differences is zero.

list = [1 2
        4 3
        2 4

order = [1 3 2]

yields: [1 2][2 4][4 3]
    or: abs(2-2) + abs(4-4)
    or:        0 + 0
    or: 0

There is a unique solution to this problem where the final score is zero.

Solve

Last solution submitted on Sep 18, 2019

Manish Joshi on 18 May 2015

Interesting...

Roche de Guzman on 18 Oct 2016

awesome problem!

Ramoflaple on 7 Jul 2015

I finally figure out that you use '+length(list)' to index the second column of the list.