package main

import "fmt"

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