?? zp1644_tle.cpp
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//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
//---------------------------------------------------------------------------
#pragma argsused
#include <stdio.h>
int main(int argc, char* argv[])
{
int a[32800],i,j,n;
double tm,mx,s,ss,sm,total;
while (scanf("%d",&n)!=EOF)
{
s=0;
tm=0;
for (i=1;i<=n;i++)
{
scanf("%d",a+i);
a[i+n]=a[i];
s+=a[i];
tm+=s/i;
}
mx=tm;
total=s;
for (i=2;i<=n;i++)
total+=s/i;
for (i=2;i<=n;i++)
{
ss=s;
ss-=a[i];
tm=total-ss;
for (j=2;j<n;j++)
{
ss-=a[i+j-1];
tm-=ss/j;
if (tm<mx)
break;
}
if (tm>mx)
mx=tm;
}
printf("%.2f\n",mx/n);
}
return 0;
}
//---------------------------------------------------------------------------
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