public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  final int M = 1_000_000_007 ;
  int N = scanner . nextInt ( ) ;
  int [ ] c = new int [ N ] ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) c [ i ] = scanner . nextInt ( ) ;
  HashMap < Integer , Integer > lastPos = new HashMap < > ( ) ;
  long [ ] dp = new long [ N + 1 ] ;
  dp [ 0 ] = 1 ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    dp [ i ] = dp [ i - 1 ] ;
    int color = c [ i - 1 ] ;
    if ( lastPos . containsKey ( color ) && lastPos . get ( color ) < i - 1 ) {
      dp [ i ] += dp [ lastPos . get ( color ) ] ;
      if ( dp [ i ] >= M ) dp [ i ] -= M ;
    }
    lastPos . put ( color , i ) ;
  }
  System . out . println ( dp [ N ] ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; final int M = 1_000_000_007 ; int N = scanner . nextInt ( ) ; int [ ] c = new int [ N ] ; for ( int i = 0 ; i < N ; i ++ ) c [ i ] = scanner . nextInt ( ) ; HashMap < Integer , Integer > lastPos = new HashMap < > ( ) ; long [ ] dp = new long [ N + 1 ] ; dp [ 0 ] = 1 ; for ( int i = 1 ; i <= N ; i ++ ) { dp [ i ] = dp [ i - 1 ] ; int color = c [ i - 1 ] ; if ( lastPos . containsKey ( color ) && lastPos . get ( color ) < i - 1 ) { dp [ i ] += dp [ lastPos . get ( color ) ] ; if ( dp [ i ] >= M ) dp [ i ] -= M ; } lastPos . put ( color , i ) ; } System . out . println ( dp [ N ] ) ; }
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