#include<iostream> #include<cstdio> using namespace std; int main() { double a=5,b=8,c=12,d=39; printf("%.3lf",(a+b+c)*1.0/3); printf("%d %d",d/a,d%a); printf("%d %d",d/b,d%b); printf("%d %d",d/c,d%c); return 0; }