public static void main ( String [ ] args ) {
  FastReader br = new FastReader ( ) ;
  int N = br . nextInt ( ) ;
  long [ ] fac = new long [ 2 * N + 1 ] ;
  fac [ 0 ] = 1 ;
  for ( int i = 1 ;
  i <= 2 * N ;
  i ++ ) {
    fac [ i ] = ( fac [ i - 1 ] * i ) % MOD ;
  }
  int [ ] a = new int [ 2 * N ] ;
  for ( int i = 0 ;
  i < 2 * N ;
  i ++ ) {
    a [ i ] = br . nextInt ( ) ;
  }
  Arrays . sort ( a ) ;
  long sum = 0 ;
  for ( int i = N ;
  i < 2 * N ;
  i ++ ) {
    sum += a [ i ] ;
  }
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    sum -= a [ i ] ;
  }
  sum %= MOD ;
  sum *= fac [ 2 * N ] ;
  sum %= MOD ;
  sum *= inv ( fac [ N ] , MOD ) ;
  sum %= MOD ;
  sum *= inv ( fac [ N ] , MOD ) ;
  sum %= MOD ;
  System . out . println ( sum ) ;
}

public static void main ( String [ ] args ) { FastReader br = new FastReader ( ) ; int N = br . nextInt ( ) ; long [ ] fac = new long [ 2 * N + 1 ] ; fac [ 0 ] = 1 ; for ( int i = 1 ; i <= 2 * N ; i ++ ) { fac [ i ] = ( fac [ i - 1 ] * i ) % MOD ; } int [ ] a = new int [ 2 * N ] ; for ( int i = 0 ; i < 2 * N ; i ++ ) { a [ i ] = br . nextInt ( ) ; } Arrays . sort ( a ) ; long sum = 0 ; for ( int i = N ; i < 2 * N ; i ++ ) { sum += a [ i ] ; } for ( int i = 0 ; i < N ; i ++ ) { sum -= a [ i ] ; } sum %= MOD ; sum *= fac [ 2 * N ] ; sum %= MOD ; sum *= inv ( fac [ N ] , MOD ) ; sum %= MOD ; sum *= inv ( fac [ N ] , MOD ) ; sum %= MOD ; System . out . println ( sum ) ; }
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