From ddf68c923f9d41abe4ff75c6a0d2f410df35a2bf Mon Sep 17 00:00:00 2001
From: Dimitri Lozeve <dimitri@lozeve.com>
Date: Fri, 8 May 2020 15:14:25 +0200
Subject: [PATCH] Solve problem 8

---
 phase1.dyalog | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/phase1.dyalog b/phase1.dyalog
index a2e5aa3..07c9234 100644
--- a/phase1.dyalog
+++ b/phase1.dyalog
@@ -9,3 +9,5 @@
  {⍵[⍋⍺≠⍵]}
  ⍝ 7: See You in a Bit
  {f←⍸∘⌽(2∘⊥⍣¯1)⋄∧/(f⍺)∊f⍵}
+ ⍝ 8: Zigzag Numbers
+ (∧/2 ¯2∊⍨2-/∘×2-/(10∘⊥⍣¯1))