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