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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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8
Task/Hofstadter-Q-sequence/Sidef/hofstadter-q-sequence-1.sidef Normal file
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@ -0,0 +1,8 @@
func Q(n) is cached {
n <= 2 ? 1
 : Q(n - Q(n-1))+Q(n-Q(n-2))
}
 
say "First 10 terms: #{ {|n| Q(n) }.map(1..10) }"
say "Term 1000: #{Q(1000)}"
say "Terms less than preceding in first 100k: #{2..100000->count{|i|Q(i)<Q(i-1)}}"

8
Task/Hofstadter-Q-sequence/Sidef/hofstadter-q-sequence-2.sidef Normal file
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var Q = [0, 1, 1]
100_000.times {
Q << (Q[-Q[-1]] + Q[-Q[-2]])
}
 
say "First 10 terms: #{Q.ft(1, 10)}"
say "Term 1000: #{Q[1000]}"
say "Terms less than preceding in first 100k: #{2..100000->count{|i|Q[i]<Q[i-1]}}"