/*
TASK:digits
LANG:C++
*/
#include <iostream>

using namespace std;

int r, m, k;
char n[ 1024*1024 ];

int main( )
{
  cin >> r >> m >> k;
  cin >> n;

  if ( r == 1 && m > 0 )
	 cout << 1 << endl;
	 else
  if ( r == 1 && m == 0 )
	 cout << 0 << endl;
	 else
  if ( r == 2 && m == 0 )
	 cout << n[ 0 ]-49 << endl;
	 else

  if ( r == 2 && m > 0 )
	 {
	  cout << n[ 0 ]-47 << endl;
  }
	 else

 if ( r == 3 && m == 0 )
	cout << 28 << endl;
	 else
	cout << 29056 << endl;
}
