package main import "fmt" func main() { var n int fmt.Scan(&n) if n < 3 { fmt.Print(-1) } else { switch (n - 2) % 4 { case 1: fmt.Print(2) case 2: fmt.Print(3) case 3: fmt.Print(2) case 0: fmt.Print(4) } } }
package main import "fmt" func main() { var n int fmt.Scan(&n) if n < 3 { fmt.Print(-1) } else { switch (n - 2) % 4 { case 1: fmt.Print(2) case 2: fmt.Print(3) case 3: fmt.Print(2) case 0: fmt.Print(4) } } }