C++ :

#include <cstdio>
int main(){
    int k; if(scanf("%d",&k)!=1) return 0;
    if(k<=0){printf("No\n");return 0;}
    int any=0;
    for(int n=10000;n<=30000;n++){
        int s1=n/100, s2=n/10%1000, s3=n%1000;
        if(s1%k==0&&s2%k==0&&s3%k==0){printf("%d\n",n);any=1;}
    }
    if(!any)printf("No\n");
    return 0;
}