#include int main(void){ double ans; int a,b,c[100],min=-1,max=1000,minnum,maxnum,sum=0; for(a=0;a!=6;a++){ scanf("%d",c[a]); } for(a=0;a!=6;a++){ if(min>=c[a]){min=c[a];minnum=a;} else if(max<=c[a]){max=c[a];maxnum=a;} } c[maxnum]=-1; c[minnum]=-1; for(a=0;a!=6;a++){ if(c[a]==-1){} else{sum=sum+c[a];} } ans=(double)sum/4.0; printf("%lf\n",ans); }