package main
import (
"fmt"
)
func main() {
num_list := []int{3, 4, 5, 2, 1}
fmt.Print(solution(num_list))
}
func solution(num_list []int) []int {
last := num_list[len(num_list)-1]
front := num_list[len(num_list)-2]
if last > front {
return append(num_list, last-front)
} else {
return append(num_list, last*2)
}
}