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38 lines
519 B

package main
import (
student "student"
"github.com/01-edu/public/go/tests/lib"
)
func collatzCountdown(start int) int {
if start <= 0 {
return -1
}
steps := 0
for start != 1 {
if start%2 == 0 {
start = start / 2
} else {
start = 3*start + 1
}
steps++
}
return steps
}
func main() {
args := append(lib.MultRandIntBetween(2, 20),
lib.RandIntBetween(-6, 20),
-5,
0,
)
for _, v := range args {
lib.Challenge("CollatzCountdown", student.CollatzCountdown, collatzCountdown, v)
}
}