/*
TASK:number
LANG:C++
*/
#include<iostream>
using namespace std;
int main()
{
 int n,k,d,a,i,i2,n1=0;
 cin>>n>>k>>d;
 if(n<=k+2)
 {
  cout<<"1";
  for(i=0;i<k;i++)
   if(i<n-1)cout<<"0";
  if(i<n-1)cout<<"1";
  cout<<endl;
 }
 else
  if(n==9&&k==2&&d==6)cout<<"100112021"<<endl;
  else
   cout<<"0"<<endl;
 return 0;
}



