Find The Multiple poj 1426 bfs
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Find The Multiple
Time Limit: 1000MS Memory Limit: 10000KTotal Submissions: 28309 Accepted: 11735 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
26190
Sample Output
10100100100100100100111111111111111111
#include <iostream>#include<queue>#include<cstdio>#include<cstring>using namespace std;long long dfs(int n){ queue<long long>q; q.push(1); while(1) { long long c=q.front(); q.pop(); if(c%n==0) return c; q.push(c*10+1); q.push(c*10); }}int main(){ int n; while(cin>>n&&n) { cout<<dfs(n)<<endl; } return 0;}#include<cstdio>#include<cstring>#include<iostream>using namespace std;int dfs(long long pre,long long x,long long n){if(pre>x) return 0;//判断是否溢出,溢出了就不是正解if(x%n==0){ cout<<x<<endl;return 1;}if(dfs(x,x*10,n)) return 1;return dfs(x,x*10+1,n);}int main(){ int n; while(scanf("%d",&n)!=EOF&&n) { dfs(0,1,n); }}#include <iostream>#include <stdio.h>using namespace std;typedef unsigned long long LL; //这里可以用long longint f;LL ans;void dfs(LL n,LL mu,int s){ if(f||(s==19)) return; if(mu%n==0) { f=1; ans=mu; return; } else { dfs(n,mu*10,s+1); dfs(n,mu*10+1,s+1); } return;}int main(){ int n; while(1) { f=0; scanf("%d",&n); if(!n) break; LL nn=n; dfs(nn,1,0); printf("%I64u\n",ans); } return 0;}
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