#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; }