#include <iostream> #include <cstdio> #include <iomanip> using namespace std; int main(){ int a,max,min,sum,i; cin>>a; max=a; min=a; sum=a; double n; for(i=2;i<=10;i++){ cin>>a; if(a>max)max=a; if(a<min)min=a; sum+=a; } n=(sum-max-min)*1.00/8; cout<<fixed<<setprecision(2)<<n; return 0; }