public static void main ( String args [ ] ) {
  Scanner scan = new Scanner ( System . in ) ;
  int n = scan . nextInt ( ) ;
  int m = scan . nextInt ( ) ;
  int [ ] arr = new int [ n ] ;
  int c = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int a = scan . nextInt ( ) ;
    if ( a < 0 ) {
      arr [ i ] = a ;
      c ++ ;
    }
  }
  int sum = 0 ;
  Arrays . sort ( arr ) ;
  if ( c >= m ) {
    for ( int i = 0 ;
    i < m ;
    i ++ ) {
      sum = sum + Math . abs ( arr [ i ] ) ;
    }
  }
  else {
    for ( int i = 0 ;
    i < arr . length ;
    i ++ ) {
      sum = sum + Math . abs ( arr [ i ] ) ;
    }
  }
  System . out . print ( sum ) ;
}

public static void main ( String args [ ] ) { Scanner scan = new Scanner ( System . in ) ; int n = scan . nextInt ( ) ; int m = scan . nextInt ( ) ; int [ ] arr = new int [ n ] ; int c = 0 ; for ( int i = 0 ; i < n ; i ++ ) { int a = scan . nextInt ( ) ; if ( a < 0 ) { arr [ i ] = a ; c ++ ; } } int sum = 0 ; Arrays . sort ( arr ) ; if ( c >= m ) { for ( int i = 0 ; i < m ; i ++ ) { sum = sum + Math . abs ( arr [ i ] ) ; } } else { for ( int i = 0 ; i < arr . length ; i ++ ) { sum = sum + Math . abs ( arr [ i ] ) ; } } System . out . print ( sum ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) body: (block (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)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (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))) (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 (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (expression_statement (update_expression (identifier))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (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: (identifier) right: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))))))))) alternative: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))