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Ingy döt Net 2023-07-01 11:58:00 -04:00
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commit cb5bb5e222
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Task/Cut-a-rectangle/J/cut-a-rectangle-1.j Normal file
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init=: - {. 1: NB. initial state: 1 square choosen
prop=: < {:,~2 ~:/\ ] NB. propagate: neighboring squares (vertically)
poss=: I.@,@(prop +. prop"1 +. prop&.|. +. prop&.|."1)
keep=: poss -. <:@#@, - I.@, NB. symmetrically valid possibilities
N=: <:@-:@#@, NB. how many neighbors to add
step=: [: ~.@; <@(((= i.@$) +. ])"0 _~ keep)"2
all=: step^:N@init

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Task/Cut-a-rectangle/J/cut-a-rectangle-2.j Normal file
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'.#' <"2@:{~ all 3 4
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$ all 4 5
39 4 5
3 13$ '.#' <"2@:{~ all 4 5
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└─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘