#include<iostream> // cin\cout\endl using namespace std; int main(){ double a=5,b=8,c=12; printf("%.3lf\n",(a+b+c)/3.0); printf("%d %d\n",39/5,39%5); printf("%d %d\n",39/8,39%8); printf("%d %d\n",39/12,39%12); return 0; }