public static void main ( String [ ] args ) {
  int n = 0 ;
  int d = 0 ;
  int [ ] arr = new int [ MAX ] ;
  int count = 0 ;
  Scanner scanner = new Scanner ( System . in ) ;
  n = scanner . nextInt ( ) ;
  d = scanner . nextInt ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    arr [ i ] = scanner . nextInt ( ) ;
  }
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    if ( arr [ i ] >= arr [ i + 1 ] ) {
      count += ( arr [ i ] - arr [ i + 1 ] ) / d + 1 ;
      arr [ i + 1 ] += ( ( arr [ i ] - arr [ i + 1 ] ) / d + 1 ) * d ;
    }
  }
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { int n = 0 ; int d = 0 ; int [ ] arr = new int [ MAX ] ; int count = 0 ; Scanner scanner = new Scanner ( System . in ) ; n = scanner . nextInt ( ) ; d = scanner . nextInt ( ) ; for ( int i = 0 ; i < n ; i ++ ) { arr [ i ] = scanner . nextInt ( ) ; } for ( int i = 0 ; i < n - 1 ; i ++ ) { if ( arr [ i ] >= arr [ i + 1 ] ) { count += ( arr [ i ] - arr [ i + 1 ] ) / d + 1 ; arr [ i + 1 ] += ( ( arr [ i ] - arr [ i + 1 ] ) / d + 1 ) * d ; } } System . out . println ( count ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (identifier)) right: (decimal_integer_literal)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (identifier)) right: (decimal_integer_literal))) right: (identifier)))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))