Find The Multiple

Posted 2022-09-17 edviv

https://vjudge.net/problem/POJ-1426

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

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <queue>
 4 #define ll long long
 5 using namespace std;
 6 void bfs(int n)
 7 
 8     queue<ll>q;
 9     q.push(1);
10     while(!q.empty())
11     
12         int i;
13         ll x;
14         x=q.front();
15         q.pop();
16         if(!(x%n))
17         
18             printf("%lld\n",x);
19             return ;
20         
21         q.push(x*10);
22         q.push(x*10+1);
23     
24 
25 int main()
26 
27     int n;
28     while(scanf("%d",&n))
29     
30         if(!n) break;
31         else bfs(n);
32     
33     return 0;
34