K,A 4

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,suma=0,n;
    float avg;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    suma+=i;
    avg=suma/(float)n;
        printf("%d %.2f \n",suma,avg);
    return 0;
}