#include <bits/stdc++.h> using namespace std; int main (){ int a,b,c,d; a=5; b=8; c=12; d=(a+b+c)/3; cout<<d<<endl; double e,f,g,h; e=39; f=e/a; g=e/b; h=e/c; printf("%.3lf %.3lf %.3lf",f,g,h); return 0; }