static int totalBoxesRemoved ( int arr [ ] , int n ) {
  int count = 0 ;
  int prev = arr [ 0 ] ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    if ( arr [ i ] > prev ) {
      count += ( arr [ i ] - prev ) ;
      arr [ i ] = prev ;
      prev = arr [ i ] ;
    }
    else {
      prev = arr [ i ] ;
    }
  }
  return count ;
}

static int totalBoxesRemoved ( int arr [ ] , int n ) { int count = 0 ; int prev = arr [ 0 ] ; for ( int i = 1 ; i < n ; i ++ ) { if ( arr [ i ] > prev ) { count += ( arr [ i ] - prev ) ; arr [ i ] = prev ; prev = arr [ i ] ; } else { prev = arr [ i ] ; } } return count ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier) dimensions: (dimensions)) (formal_parameter type: (integral_type) 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: (array_access array: (identifier) index: (decimal_integer_literal)))) (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))))))) (return_statement (identifier))))