#include <stdio.h>

int main() {
  int n;
  float avg;
  scanf("%d",&n);
  int sum=0;
  int arr[n];
  for(int i=0;i<n;i++){
      scanf("%d",&arr[i]);
  }
  for(int i=0;i<n;i++){
      sum=sum+arr[i];
      avg=sum/n;
  }
  printf("su:%d",sum);
  printf("avg:%.2f"\n,avg);
  return 0;
}