#include<stdio.h>    
    
int main(void){    
    int j,m,b;
    scanf("%d",&j);
    scanf("%d",&m);
    scanf("%d",&b);
    int T=j+m+b;
    float A=T/3;
    printf("%d\n",T);
    printf("%.1f\n",A);
    
    return 0;
}