package main

import "fmt"

func main() {
	var N int
	fmt.Scan(&N)
	var i, j int
	for i = 1; i <= N; i++ {
		for j = i; i+j <= N; j++ {
			k := N - i - j
			if i+j+k == N {
				fmt.Println(i, j, k)
				break
			}
		}
	}
}