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