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