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