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