朴素解法

public class Main{
	public static void main(String[] args){		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		int a=0;
		int b=0;
		int c=0;
		for(a=0;a<=20;a++){
			for(b=0;b<=33;b++){
				for(c=0;c<=100;c+=3){
					if(a*5+b*3+c/3==100 && a+b+c==100){
						System.out.println(a+" "+b+" "+c);
					}
				}
			}
		}
	}
}