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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Hofstadter-Q-sequence/Wren/hofstadter-q-sequence.wren Normal file
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var N = 1e5
var q = List.filled(N + 1, 0)
q[1] = 1
q[2] = 1
for (n in 3..N) q[n] = q[n - q[n-1]] + q[n - q[n-2]]
System.print("The first ten terms of the Hofstadter Q sequence are:")
System.print(q[1..10])
System.print("\nThe thousandth term is %(q[1000]).")
var flips = 0
for (n in 2..N) {
if (q[n] < q[n-1]) flips = flips + 1
}
System.print("\nThere are %(flips) flips in the first %(N) terms.")