public static int minCost ( int [ ] array ) {
  int len = array . length ;
  if ( len == 0 || len == 1 ) {
    return 0 ;
  }
  int sum = 0 ;
  LinkedList < Integer > queue = new LinkedList < > ( ) ;
  Arrays . sort ( array ) ;
  queue . offer ( array [ 0 ] ) ;
  for ( int i = 1 ;
  i < len ;
  i ++ ) {
    int temp = queue . getLast ( ) ;
    if ( array [ i ] <= temp ) {
      sum += temp - array [ i ] + 1 ;
      queue . addLast ( temp + 1 ) ;
    }
    else {
      queue . addLast ( temp ) ;
    }
  }
  return sum ;
}

public static int minCost ( int [ ] array ) { int len = array . length ; if ( len == 0 || len == 1 ) { return 0 ; } int sum = 0 ; LinkedList < Integer > queue = new LinkedList < > ( ) ; Arrays . sort ( array ) ; queue . offer ( array [ 0 ] ) ; for ( int i = 1 ; i < len ; i ++ ) { int temp = queue . getLast ( ) ; if ( array [ i ] <= temp ) { sum += temp - array [ i ] + 1 ; queue . addLast ( temp + 1 ) ; } else { queue . addLast ( temp ) ; } } return sum ; }
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