#include <stdio.h>

int main()
{
    int a,b,c,d;
    float sum=0,ave;

    printf("input 4 int data:\n");
    scanf("%d %d %d %d", &a, &b, &c, &d);

    sum=a+b+c+d;
    ave=((int)(sum / 4.0*10))/10.0;

    printf("sum=%d mean=%.1f\n",sum,ave);
    return 0;
}