简单暴力了一下，没过，找不出来

#include<bits/stdc++.h>
#define ll long long 
using namespace std;
bool ab(ll x)
{
	ll a=0,b=0,len;
	if(x%10==0) len+=1;
	while(x)
	{
		if(x%10==0) a++;
		if(x%10==1) b++;
		x/=10;
		len++;
	}
	if(a+b==len) return 1;
	else return 0;
}
int main()
{
	ll n;
	cin>>n;
	cout<<1<<endl;
	for(ll i=1;i<=1000;i++)
	{   
		const ll abin=i*n;
		if(ab(abin))
		{
			cout<<i<<' '<<i*n;
			return 0;
		}
	}
	cout<<0<<endl;
	return 0;
}