#include <iostream>
using namespace std;
typedef long long ll;

ll presmetuvanje_zbir(ll n)
{
    ll zbir=0,pom=n;
    while(pom>0)
    {
        zbir+=pom;
        pom/=10;
    }
    return zbir;
}
int main()
{
    ll z;
    int c;
    cin>>z>>c;
    ll l=pow(10,c-1),r=pow(10,c)-1;
    ll res=0;
    while(l<=r)
    {
        ll middle=(l+r)/2;
        ll zbir=presmetuvanje_zbir(middle);
        if(zbir==z)
        {
            res=middle;
            break;
        }
        else if(zbir<z)
            l=middle+1;
        else
            r=middle-1;
    }
    cout<<res;
    return 0;
}