Advent of Code day 9
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| intcode←{ | |
| ⍺←0 0 ⋄ (i rb)←⍺ ⋄ val←⊃⍵[0] ⋄ addr←⊃⍵[1] | |
| get←{ ⍵<0: ⎕←'ERR: invalid negative index' | |
| (addr⍳⍵)<(≢addr):(addr⍳⍵)⌷val | |
| addr,←⍵ ⋄ val,←0 ⋄ ∇ ⍵ } | |
| set←{ (addr⍳⍺)<(≢addr):((addr⍳⍺)⌷val)←⍵ | |
| addr,←⍺ ⋄ val,←⍵ } | |
| instr←(10 10 10 10 10)⊤(get i) ⋄ opcode←(10 10)⊥¯2↑instr ⋄ p_modes←⌽3↑instr | |
| p←{mode←p_modes[⍵-1] | |
| mode=0:get i+⍵ ⍝ positional | |
| mode=1:i+⍵ ⍝ immediate | |
| mode=2:(get i+⍵)+rb ⍝ relative base | |
| 'ERR: Unknown parameter mode',mode} | |
| i≥≢val:'ERR: no HALT opcode' | |
| 1=opcode:{_←(p 3) set ((get p 1)+(get p 2)) ⋄ ((i+4) rb) intcode val addr}⍵ | |
| 2=opcode:{_←(p 3) set ((get p 1)×(get p 2)) ⋄ ((i+4) rb) intcode val addr}⍵ | |
| 3=opcode:{_←(p 1) set ⍎⍞ ⋄ ((i+2) rb) intcode val addr}⍵ | |
| 4=opcode:{⎕←(get p 1) ⋄ ((i+2) rb) intcode val addr}⍵ | |
| 5=opcode:{0≠(get p 1): ((get p 2) rb) intcode val addr | |
| ((i+3) rb) intcode val addr}⍵ | |
| 6=opcode:{0=(get p 1): ((get p 2) rb) intcode val addr | |
| ((i+3) rb) intcode val addr}⍵ | |
| 7=opcode:{(get p 1)<(get p 2):{_←(p 3) set 1 ⋄ ((i+4) rb) intcode val addr}⍵ | |
| {_←(p 3) set 0 ⋄ ((i+4) rb) intcode val addr}⍵ }⍵ | |
| 8=opcode:{(get p 1)=(get p 2):{_←(p 3) set 1 ⋄ ((i+4) rb) intcode val addr}⍵ | |
| {_←(p 3) set 0 ⋄ ((i+4) rb) intcode val addr}⍵ }⍵ | |
| 9=opcode:{rb+←(get p 1) ⋄ ((i+2) rb) intcode val addr}⍵ | |
| 99=opcode:'' | |
| 'ERR: Unknown opcode',opcode | |
| } | |
| in←⍎¨','(≠⊆⊢) ⊃⊃⎕nget '09.input' 1 |
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