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