public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int A = sc . nextInt ( ) ;
  int B = sc . nextInt ( ) ;
  long K = sc . nextLong ( ) ;
  long ans = 0 ;
  long [ ] comb = new long [ n + 1 ] ;
  comb [ 0 ] = 1 ;
  for ( int i = 1 ;
  i < n + 1 ;
  i ++ ) {
    comb [ i ] = comb [ i - 1 ] * ( n - i + 1 ) % MOD * pow ( i , MOD - 2 ) % MOD ;
  }
  long q = K + A ;
  for ( int x = 0 ;
  x <= n ;
  x ++ ) {
    q -= A ;
    if ( q % B == 0 ) {
      long y = q / B ;
      if ( y > n ) continue ;
      if ( y < 0 ) break ;
      ans = ( ans + comb [ x ] * comb [ ( int ) y ] % MOD ) % MOD ;
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int A = sc . nextInt ( ) ; int B = sc . nextInt ( ) ; long K = sc . nextLong ( ) ; long ans = 0 ; long [ ] comb = new long [ n + 1 ] ; comb [ 0 ] = 1 ; for ( int i = 1 ; i < n + 1 ; i ++ ) { comb [ i ] = comb [ i - 1 ] * ( n - i + 1 ) % MOD * pow ( i , MOD - 2 ) % MOD ; } long q = K + A ; for ( int x = 0 ; x <= n ; x ++ ) { q -= A ; if ( q % B == 0 ) { long y = q / B ; if ( y > n ) continue ; if ( y < 0 ) break ; ans = ( ans + comb [ x ] * comb [ ( int ) y ] % MOD ) % MOD ; } } System . out . println ( ans ) ; }
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