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December 3, 2019 02:30
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Advent of Code day 2
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| ⎕IO←0 | |
| find←{ | |
| ⍺←0 | |
| in←(⊃⍺⌷,(⍳100)∘.,⍳100) set ⊃0⌷⍵ | |
| (⊃1⌷⍵)=0⌷intcode in:in[1 2] | |
| (⍺+1)∇in (⊃1⌷⍵) | |
| } | |
| set←{s←⍵ ⋄ s[1 2]←⍺[0 1] ⋄ s} | |
| intcode←{ | |
| ⍺←0 ⋄ s←state←⍵ | |
| (a b c)←in[⍺+1],in[⍺+2],in[⍺+3] | |
| ⍺≥0⌷⍴⍵:'ERR: no HALT opcode' | |
| 1=⍺⌷⍵:⍺{s[c]←⍵[a]+⍵[b] ⋄ (⍺+4)intcode s}⍵ | |
| 2=⍺⌷⍵:⍺{s[c]←⍵[a]×⍵[b] ⋄ (⍺+4)intcode s}⍵ | |
| 99=⍺⌷⍵:,⍵ | |
| 'ERR: Unknown opcode' | |
| } | |
| in←⍎¨','(≠⊆⊢) ⊃⊃⎕nget '02.input' 1 | |
| pt1←0⌷intcode 12 2 set in | |
| pt2←find in 19690720 |
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