#include<bits/stdc++.h> using namespace std; int main() { double n; n = (5 + 8 + 12) / 3.0; printf("%.3f", n); cout << endl; cout << 39 / 5 << " " << 39 % 5 << endl; cout << 39 / 8 << " " << 39 % 8 << endl; cout << 39 / 12 << " " << 39 % 12 ; return 0; }