#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 a=5,b=8,c=12; double pingjun; pingjun=(a+b+c)*1.0/3; printf("%.3lf\n",pingjun); cout<<39/a<<' '<<39%a<<endl; cout<<39/b<<' '<<39%b<<endl; cout<<39/c<<' '<<39%c; return 0; }