http://poj.org/problem?id=3472 //* @author import java.util.*; import java.io.*; import java.math.*; public class Main { /** * @param args the command line arguments */ static BigInteger []a=new BigInteger[10005]; public static void main(String[] args) { // TODO code application logic here int n; a[0]=BigInteger.ONE; a[1]=BigInteger.ONE; for(int i=2;i<=10000;i++) a[i]=a[i-1].add(a[i-2]); Scanner cin=new Scanner(System.in); while(cin.hasNext()){ n=cin.nextInt(); BigInteger ans=a[n-1].pow(4); ans=ans.add(a[n].pow(2).multiply(a[n-2].pow(2))); ans=ans.add(BigInteger.valueOf(6).multiply(a[n].multiply(a[n-2].multiply(a[n-1].pow(2))))); ans=ans.multiply(BigInteger.valueOf(2)).add(BigInteger.valueOf(2)); String s=ans.toString(); StringBuffer sbf=new StringBuffer(); int p=0; for(int i=s.length()-1;i>=0;i--){ p++; sbf.append(s.charAt(i)); if(p==3&&i>0){ sbf.append(","); p=0; } } sbf.reverse(); System.out.println(sbf.toString()); } } }
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