23 lines
410 B
Plaintext
23 lines
410 B
Plaintext
func collatz_num[n: i64] : i64
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if n % 2 == 0
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return n / 2
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return n * 3 + 1
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func collatz_seq[n: i64]: i64
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i := 1
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while n != 1
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n = collatz_num(n)
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i += 1
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return i
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func main[] : i64
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max := 0
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max_index := 0
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for i in 1..1000000
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seq := collatz_seq(i)
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if seq > max
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max = seq
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max_index = i
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io.println_i64(max_index)
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