public static void main ( String [ ] args ) {
  Reader input = new Reader ( ) ;
  PrintWriter out = new PrintWriter ( System . out ) ;
  int n = input . nextInt ( ) ;
  int [ ] a = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    a [ i ] = input . nextInt ( ) ;
  }
  int sum = 0 ;
  for ( int x : a ) {
    sum += x ;
  }
  int result = 0 ;
  for ( int x : a ) {
    if ( ( sum - x ) % 2 == 0 ) {
      result ++ ;
    }
  }
  out . println ( result ) ;
  out . close ( ) ;
}

public static void main ( String [ ] args ) { Reader input = new Reader ( ) ; PrintWriter out = new PrintWriter ( System . out ) ; int n = input . nextInt ( ) ; int [ ] a = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] = input . nextInt ( ) ; } int sum = 0 ; for ( int x : a ) { sum += x ; } int result = 0 ; for ( int x : a ) { if ( ( sum - x ) % 2 == 0 ) { result ++ ; } } out . println ( result ) ; out . close ( ) ; }
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