POJ 1426, Find The Multiple

Time Limit: 1000MS  Memory Limit: 10000K
Total Submissions: 4446  Accepted: 1908  Special Judge

Description
Given a positive integer n, write a program to find out a nonzero multiple m of n whose decimal representation contains only the digits 0 and 1. You may assume that n is not greater than 200 and there is a corresponding m containing no more than 100 decimal digits.

 

Input
The input file may contain multiple test cases. Each line contains a value of n (1 <= n <= 200). A line containing a zero terminates the input.

 

Output
For each value of n in the input print a line containing the corresponding value of m. The decimal representation of m must not contain more than 100 digits. If there are multiple solutions for a given value of n, any one of them is acceptable.

 

Sample Input
2
6
19
0

 

Sample Output
10
100100100100100100
111111111111111111

 

Source
Dhaka 2002

---

//  POJ1426.cpp : Defines the entry point for the console application.
//

#include  < iostream >
using   namespace  std;

int  main( int  argc,  char *  argv[])
{
     int  N;
    unsigned  long   long  que[ 800000 ];

     while  (cin  >>  N  &&  N  !=   0 )
    {
         int  front  =   0 , rear  =   0 ;
        que[rear ++ ]  =   1 ;

        unsigned  long   long  num;
         while (front  !=  rear)
        {
            num  =  que[front ++ ];
            front  %=   800000 ;

             if  ((num  %  N)  ==   0 ) 
                 break ;

            num  *=   10 ;
            que[rear ++ ]  =  num;
            rear  %=   800000 ;

             ++ num;
            que[rear ++ ]  =  num;
            rear  %=   800000 ;
        }
        cout  <<  num  <<  endl;
    }
     return   0 ;
}