static int lenOfLongSubarrWithGivenSum ( int arr [ ] , int n , int k ) {
  HashMap < Integer , Integer > um = new HashMap < Integer , Integer > ( ) ;
  int sum = 0 , maxLen = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    sum += arr [ i ] ;
    if ( sum == k ) maxLen = i + 1 ;
    if ( um . containsKey ( sum ) ) um . put ( sum , i ) ;
    if ( um . containsKey ( sum - k ) ) {
      if ( maxLen < ( i - um . get ( sum - k ) ) ) maxLen = i - um . get ( sum - k ) ;
    }
  }
  return maxLen ;
}

static int lenOfLongSubarrWithGivenSum ( int arr [ ] , int n , int k ) { HashMap < Integer , Integer > um = new HashMap < Integer , Integer > ( ) ; int sum = 0 , maxLen = 0 ; for ( int i = 0 ; i < n ; i ++ ) { sum += arr [ i ] ; if ( sum == k ) maxLen = i + 1 ; if ( um . containsKey ( sum ) ) um . put ( sum , i ) ; if ( um . containsKey ( sum - k ) ) { if ( maxLen < ( i - um . get ( sum - k ) ) ) maxLen = i - um . get ( sum - k ) ; } } return maxLen ; }
(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)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier) (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_identifier) (type_identifier))) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) 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))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) consequence: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier))))) consequence: (block (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (parenthesized_expression (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))))))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))))))))))) (return_statement (identifier))))