public static void main ( String [ ] args ) {
  int n = scanner . nextInt ( ) , last = 0 , ans = 0 ;
  for ( int i = 0 , j ;
  i < n ;
  i ++ , last = j ) if ( last >= ( j = scanner . nextInt ( ) ) ) ans += last - j ;
  System . out . println ( last + ans ) ;
}

public static void main ( String [ ] args ) { int n = scanner . nextInt ( ) , last = 0 , ans = 0 ; for ( int i = 0 , j ; i < n ; i ++ , last = j ) if ( last >= ( j = scanner . nextInt ( ) ) ) ans += last - j ; System . out . println ( last + ans ) ; }
(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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) update: (assignment_expression left: (identifier) right: (identifier)) body: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))))))