#include <stdio.h>

int main() {
    int arr[5], i;
    int sum=0;
    float avg;
    for (i=0;i<5;i++){
        scanf("%d",&arr[i]);
    }
    for (i=0;i<5;i++){
        sum=sum+arr[i];
    }
    avg=sum/5;
    printf("\nthe sum of the class marks: %d",sum);
    printf("\nthe average of the class marks is:%.2f",avg);
    return 0;
}