#include <stdio.h>
int main()
{
	int i, a, sum=0, data[10];
	double average;

	for (i=0; i<10; i++)
	{
		scanf("%d",&a);
		data[i] = a;
	}

	for (i=0; i<10; i++)
		sum = sum + data[i];

	average = (double)sum / 10.0;

	printf("平均点は %lf 点です。",average);
	return 0;
}