public static void main ( String args [ ] ) {
  FastReader input = new FastReader ( ) ;
  PrintWriter out = new PrintWriter ( System . out ) ;
  int T = 1 ;
  while ( T -- > 0 ) {
    long k = input . nextLong ( ) ;
    long v = 9 ;
    long s = 0 ;
    int x = 1 ;
    while ( true ) {
      if ( s + v * x > k ) {
        break ;
      }
      s += v * x ;
      v *= 10 ;
      x ++ ;
    }
    if ( s == k ) {
      out . println ( 9 ) ;
    }
    else {
      long d = k - s ;
      long u = d / x ;
      long rem = d % x ;
      long nu = ( long ) Math . pow ( 10 , x - 1 ) ;
      nu += u ;
      if ( rem == 0 ) {
        nu -- ;
        out . println ( nu % 10 ) ;
      }
      else {
        String str = String . valueOf ( nu ) ;
        out . println ( str . charAt ( ( int ) ( rem - 1 ) ) ) ;
      }
    }
  }
  out . close ( ) ;
}

public static void main ( String args [ ] ) { FastReader input = new FastReader ( ) ; PrintWriter out = new PrintWriter ( System . out ) ; int T = 1 ; while ( T -- > 0 ) { long k = input . nextLong ( ) ; long v = 9 ; long s = 0 ; int x = 1 ; while ( true ) { if ( s + v * x > k ) { break ; } s += v * x ; v *= 10 ; x ++ ; } if ( s == k ) { out . println ( 9 ) ; } else { long d = k - s ; long u = d / x ; long rem = d % x ; long nu = ( long ) Math . pow ( 10 , x - 1 ) ; nu += u ; if ( rem == 0 ) { nu -- ; out . println ( nu % 10 ) ; } else { String str = String . valueOf ( nu ) ; out . println ( str . charAt ( ( int ) ( rem - 1 ) ) ) ; } } } out . close ( ) ; }
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