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Ingy döt Net 2024-03-06 22:25:12 -08:00
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commit 0df55f9f24
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Task/Ackermann-function/Bruijn/ackermann-function.bruijn Normal file
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:import std/Combinator .
:import std/Number/Unary U
:import std/Math .
# unary ackermann
ackermann-unary [0 [[U.inc 0 1 (+1u)]] U.inc]
:test (ackermann-unary (+0u) (+0u)) ((+1u))
:test (ackermann-unary (+3u) (+4u)) ((+125u))
# ternary ackermann (lower space complexity)
ackermann-ternary y [[[=?1 ++0 (=?0 (2 --1 (+1)) (2 --1 (2 1 --0)))]]]
:test ((ackermann-ternary (+0) (+0)) =? (+1)) ([[1]])
:test ((ackermann-ternary (+3) (+4)) =? (+125)) ([[1]])