#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ printf("%.3lf\n",(5+8+12)/3.0); cout<<39/5<<" "<<39%5<<endl; cout<<39/8<<" "<<39%8<<endl; cout<<39/12<<" "<<39%12<<endl; return 0; }