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Problem 480. Aufbau principle

Created by AMITAVA BISWAS

Given the order e=[1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p], find a vector x with these conditions:

  1. sum(x)==sumofx
  2. length of x is the shortest possible
  3. x has positive integers only
  4. if e(k) contains s,p,d,f,g, then x(k) must be less than 3,7,11,15,19, respectively
  5. if x(k+1)>0 then x(k) must be maximum possible.

For example, if sumofx=3 then x=[2 1]. Return x embedded in e in the following style: electrons='1s2,2s1'. Please see more info: Aufbau Principle, Electron Shell.

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22 correct solutions 18 incorrect solutions
Last solution submitted on Nov 09, 2014

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