#include<iostream> using namespace std; int main(){ double p; int a,b,c; a=5;b=8;c=12; p=(a+b+c)*1.0/3; printf("%.3lf\n",p); cout<<39/a<<" "<<39%a<<endl; cout<<39/b<<" "<<39%b<<endl; cout<<39/c<<" "<<39%c<<endl; return 0; }