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