public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  h = sc . nextInt ( ) ;
  w = sc . nextInt ( ) ;
  k = sc . nextInt ( ) ;
  dp = new long [ h + 1 ] [ w + 2 ] ;
  dp [ 0 ] [ 1 ] = 1 ;
  for ( i = 1 ;
  i <= h ;
  i ++ ) {
    for ( j = 1 ;
    j <= w ;
    j ++ ) {
      dfs ( 1 , false , false , false ) ;
    }
  }
  System . out . println ( dp [ h ] [ k ] ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; h = sc . nextInt ( ) ; w = sc . nextInt ( ) ; k = sc . nextInt ( ) ; dp = new long [ h + 1 ] [ w + 2 ] ; dp [ 0 ] [ 1 ] = 1 ; for ( i = 1 ; i <= h ; i ++ ) { for ( j = 1 ; j <= w ; j ++ ) { dfs ( 1 , false , false , false ) ; } } System . out . println ( dp [ h ] [ k ] ) ; }
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