From 78f1d367fbd1d54f3c1e37da0016be80aaf36ff3 Mon Sep 17 00:00:00 2001
From: Dimitri Lozeve <dimitri@lozeve.com>
Date: Sat, 9 May 2020 14:15:08 +0200
Subject: [PATCH] Solve problem 10

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

diff --git a/phase1.dyalog b/phase1.dyalog
index 15c94ba..a81ef5b 100644
--- a/phase1.dyalog
+++ b/phase1.dyalog
@@ -17,4 +17,6 @@
         zigzag←∧/2=∘|2-/∘×2-/(10∘⊥⍣¯1)
         ⍝ 9: Rise and Fall
         risefall←{∧/(⍳∘≢≡⍋)¨(⊂((⊢⍳⌈/)↑⊢),⍵),⊂⌽((⊢⍳⌈/)↓⊢),⍵}
+        ⍝ 10: Stacking It Up
+        stacking←{↑⊃,/↓¨⍕¨⍵}
 :EndNamespace