HDU4788_Hard Disk Drive

#include <iostream>
#include <cstdio>
#define eps 1e-12
using namespace std;

double ans;
int t,k,n,cas=0;
char s[10];

int main()
{
scanf("%d",&t);
while (t--)
{
scanf("%d%s",&n,s);
if (s[1]=='B') k=1;
else if (s[1]=='K') k=2;
else if (s[1]=='M') k=3;
else if (s[1]=='G') k=4;
else if (s[1]=='T') k=5;
else if (s[1]=='P') k=6;
else if (s[1]=='E') k=7;
else if (s[1]=='Z') k=8;
else if (s[1]=='Y') k=9;
ans=100;
while (--k) ans/=1.024;
printf("Case #%d: %.2f",++cas,100-ans+eps);cout<<"%"<<endl;
}
return 0;
}