static int findSum ( int [ ] arr , int n , int k ) {
  int ans = arr [ n - k - 1 ] - arr [ 0 ] ;
  for ( int i = 1 ;
  i <= k ;
  i ++ ) {
    ans = Math . min ( arr [ n - 1 - ( k - i ) ] - arr [ i ] , ans ) ;
  }
  return ans ;
}

static int findSum ( int [ ] arr , int n , int k ) { int ans = arr [ n - k - 1 ] - arr [ 0 ] ; for ( int i = 1 ; i <= k ; i ++ ) { ans = Math . min ( arr [ n - 1 - ( k - i ) ] - arr [ i ] , ans ) ; } return ans ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (integral_type) dimensions: (dimensions)) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) right: (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 (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))))) right: (array_access array: (identifier) index: (identifier))) (identifier))))))) (return_statement (identifier))))