#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a1=5,a2=8,a3=12; //cin>>a1>>a2>>a3; printf("%.3lf\n",(a1+a2+a3)*1.0/3); //cout<<z1<<endl; cout<<39/a1<<' '<<39%a1<<endl; cout<<39/a2<<' '<<39%a2<<endl; cout<<39/a3<<' '<<39%a3<<endl; return 0; }