#include<stdio.h>
int main()
{
int score[7],min,max,sum;
while (scanf("%d %d %d %d %d %d %d",&score[0],&score[1],&score[2],
&score[3],&score[4],&score[5],&score[6])!=EOF)
{
min=max=score[0];
sum=0;
for (int i=0;i<7;i++)
{
min=score[i]<min?score[i]:min;
max=score[i]>max?score[i]:max;
sum+=score[i];
}
printf("%.2f\n",(sum-min-max)/5.0);
}
return 0;
}

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