RGS's solution for Problem 1, Phase 2 of 2020 APL competition (see https://mathspp.com/blog/2020-apl-competition for my thoughts on it)

P1Phase2_2020.dyalog

DiveScore ← {
    (⎕IO ⎕ML ⎕WX) ← 0 1 3
    ⍝ Computes the olympic dive score up to two decimal places.
    ⍝ Dyadic function expecting a number (dive difficulty) on the left and a vector of numbers on the right (judge scores).
    ⍝ ⍵ is assumed to have odd length ≥ 3.
    ⍝ Returns a number with, at most, 2 decimal places. 
    ⍎2⍕⍺×1⊥ (⊂⊃⍨¨3↑(÷∘2-∘3∘≢)⌽⍋) ⍵
}