#include <stdio.h>
int main() 
{
    int i,n,sum=0;
    scanf("%d",&n);
    printf("The nth natural number is:");
    printf("\nThe first %d natural numbers are:\n",n);
    for(i=1; i<=n ; i++)
        {
            printf("%d\n",i);
            sum=sum+i;
        }
            printf("Sum of the natural numbers=%d\n",sum);
     return 0;
}