http://poj.org/problem?id=1131 import java.io.*; import java.util.*; import java.math.*; public class Main{ public static void main(String[] args){ Scanner cin=new Scanner(System.in); BigDecimal temp,sum,ans,num; String str; int i,len; while(cin.hasNext()){ str=cin.next(); len=str.length(); temp=BigDecimal.valueOf(8.0); sum=BigDecimal.ONE; ans=BigDecimal.ZERO; for(i=2;i< len;i++) { int val=str.charAt(i)-'0'; num=BigDecimal.valueOf(val); sum=sum.multiply(temp); ans=ans.add(num.divide(sum)); } System.out.printf("%s [8] = ",str); System.out.println(ans+" [10]"); } } }
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