static int maxDiff ( int arr [ ] , int n ) {
  int maxDiff = - 1 ;
  int maxRight = arr [ n - 1 ] ;
  for ( int i = n - 2 ;
  i >= 0 ;
  i -- ) {
    if ( arr [ i ] > maxRight ) maxRight = arr [ i ] ;
    else {
      int diff = maxRight - arr [ i ] ;
      if ( diff > maxDiff ) {
        maxDiff = diff ;
      }
    }
  }
  return maxDiff ;
}

static int maxDiff ( int arr [ ] , int n ) { int maxDiff = - 1 ; int maxRight = arr [ n - 1 ] ; for ( int i = n - 2 ; i >= 0 ; i -- ) { if ( arr [ i ] > maxRight ) maxRight = arr [ i ] ; else { int diff = maxRight - arr [ i ] ; if ( diff > maxDiff ) { maxDiff = diff ; } } } return maxDiff ; }
(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: (unary_expression operand: (decimal_integer_literal)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) condition: (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: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) alternative: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (array_access array: (identifier) index: (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))))))))) (return_statement (identifier))))