下面是代码

#include<iostream>
using namespace std;

int main()
{
	int sub1, sub2, sub3, k, num [10001], n = 0;
	bool b;
	b=false;
	cin>>k;
	for (int i = 0; i <= 10000; i ++) num [i] = -1;
	for(int i=10000; i<=30000; i++)
		{
			sub1 = i / 100;
			sub2 = i / 10 % 1000;
			sub3=i%1000;
			if(sub1%k==0&&sub2%k==0&&sub3%k==0) num [n] = i, n ++,b=true;
		}
	if (b) for (int i = 0; i < n; i ++) cout << num [i] << endl;
	else cout<<"No";
	return 0;
}