ZOJ 1847//很怪异的计算，平坦旅费

#include<stdio.h>

int main()

{

int n,i;

double money[1005];

double sum1,sum2,p,p1,p2;

while(scanf("%d",&n)&&n!=0)

{

for(i=0,p=0;i<n;i++)

{

scanf("%lf",&money[i]);

p+=money[i];

}

p=p*1.0/n;

p2=p1=(int)(p*100);

p1=p1/100.0;

if(p2<(p*100))

p2++;

p2=p2/100.0;

for(i=0,sum1=0,sum2=0;i<n;i++)

{

if(money[i]<p)

sum1=sum1+p1-money[i];

else

sum2=sum2+money[i]-p2;

}

if(sum1>sum2)

printf("$%.2lf\n",sum1);

else

printf("$%.2lf\n",sum2);

}

return 0;

}