public static void main ( String [ ] args ) {
  Scanner s = new Scanner ( System . in ) ;
  HashMap < Integer , Integer > amounts = new HashMap < > ( ) ;
  int n = s . nextInt ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int a = s . nextInt ( ) ;
    amounts . put ( a , amounts . containsKey ( a ) ? amounts . get ( a ) + 1 : 1 ) ;
  }
  boolean answer = true ;
  for ( int i : amounts . values ( ) ) {
    if ( i > ( n + 1 ) / 2f ) {
      answer = false ;
      break ;
    }
  }
  System . out . println ( answer ? "YES" : "NO" ) ;
}

public static void main ( String [ ] args ) { Scanner s = new Scanner ( System . in ) ; HashMap < Integer , Integer > amounts = new HashMap < > ( ) ; int n = s . nextInt ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int a = s . nextInt ( ) ; amounts . put ( a , amounts . containsKey ( a ) ? amounts . get ( a ) + 1 : 1 ) ; } boolean answer = true ; for ( int i : amounts . values ( ) ) { if ( i > ( n + 1 ) / 2f ) { answer = false ; break ; } } System . out . println ( answer ? " YES " : " NO " ) ; }
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