#include<stdio.h>int main(){int n,x;scanf("%d",&n);int i=1,max=0,min=100000;double sum=0,avg;for(i=1;i<n;i++){scanf("%d",&x);if(x>max)max=x;if(x<min)min=x;sum=sum+x;}avg=sum/(n-2);printf("%.2lf",avg);
}
至少没看到减去的算式!