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