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