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