Day 21 solution.

jayfoad · Dec 21, 2018 · 9980a8d · 9980a8d
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diff --git a/p21.dyalog b/p21.dyalog
@@ -0,0 +1,7 @@
+⎕IO←0
+p←⊃⎕NGET'p21.txt'1
+input←⍎⊃'\d+'⎕S'&'⊢8⊃p
+f←{16777216|65899×16777216|⍵+⍺}
+g←{p q r←256 256 256⊤⍵ ⋄ (p+~2|p) f q f r f input}
+g 0 ⍝ part 1
+z←⍬ ⋄ {⍵∊z:⊃⌽z ⋄ z,←⍵ ⋄ ∇g ⍵}0 ⍝ part 2
diff --git a/p21.txt b/p21.txt
@@ -0,0 +1,32 @@
+#ip 2
+seti 123 0 3
+bani 3 456 3
+eqri 3 72 3
+addr 3 2 2
+seti 0 0 2
+seti 0 6 3
+bori 3 65536 4
+seti 2176960 8 3
+bani 4 255 1
+addr 3 1 3
+bani 3 16777215 3
+muli 3 65899 3
+bani 3 16777215 3
+gtir 256 4 1
+addr 1 2 2
+addi 2 1 2
+seti 27 7 2
+seti 0 9 1
+addi 1 1 5
+muli 5 256 5
+gtrr 5 4 5
+addr 5 2 2
+addi 2 1 2
+seti 25 7 2
+addi 1 1 1
+seti 17 2 2
+setr 1 7 4
+seti 7 9 2
+eqrr 3 0 1
+addr 1 2 2
+seti 5 9 2