http://poj.org/problem?id=2325 //* @author import java.io.*; import java.util.*; import java.math.*; public class Main { public static void main(String[] args) { BigInteger n,zero,ten; int count,flag,a[],i,j; a=new int[2000]; Scanner cin = new Scanner(System.in); while(cin.hasNext()) { n = cin.nextBigInteger(); zero=BigInteger.ZERO; ten=BigInteger.TEN; if(n.compareTo(BigInteger.valueOf(-1))==0) break; if(n.compareTo(ten)< 0)//n< 10 { System.out.println("1"+n); continue; } flag=0;count=0; while(true) { flag=0; for(i=9;i>=2;i--) { if(n.mod(BigInteger.valueOf(i)).compareTo(zero)==0) { flag=1; a[++count]=i; n=n.divide(BigInteger.valueOf(i)); break; } } if(n.compareTo(ten)< 0) { flag=1; a[++count]=n.intValue(); break; } if(flag==0)//�����ڶ���ÿһ��i�������Ļ� break; } if(flag==0) System.out.println("There is no such number."); else { for(i=count;i>=1;i--) System.out.print(a[i]); System.out.println(); } } } }
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