#include <iostream> #include <cstdio> using namespace std; int main() { double a,b,c,d,e,f,g,h,i,j,k,l,m; double x; cin>>a>>b>>c>>d>>f>>g>>h>>i>>j>>k>>l>>m; x=(a+b+c+d+f+g+h+i+j+k+l+m)/12; cout<<"￥"; printf("%.2f",x); return 0; }