#include<stdio.h>
int main()
    int n;
    scanf("%d" ,&n);
    if(n>=1&&n<=3){
        printf("1\n1\n");
    }
    else if(n>=4&&n=6){
        print("2\n1\2\n");
    }
    else if(n>=7&&n<=9){
        printf("3\n2\n1\n");
    }
    else if(n==10){
        printf("5\n3\n2\n");
    }
    else{
        printf("Invalid input\n");
    }
    return 0;
}