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