static int longSubarrWthSumDivByK ( int arr [ ] , int n , int k ) {
  HashMap < Integer , Integer > um = new HashMap < Integer , Integer > ( ) ;
  int mod_arr [ ] = new int [ n ] ;
  int max = 0 ;
  int curr_sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    curr_sum += arr [ i ] ;
    mod_arr [ i ] = ( ( curr_sum % k ) + k ) % k ;
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( mod_arr [ i ] == 0 ) max = i + 1 ;
    else if ( um . containsKey ( mod_arr [ i ] ) == false ) um . put ( mod_arr [ i ] , i ) ;
    else if ( max < ( i - um . get ( mod_arr [ i ] ) ) ) max = i - um . get ( mod_arr [ i ] ) ;
  }
  return max ;
}

static int longSubarrWthSumDivByK ( int arr [ ] , int n , int k ) { HashMap < Integer , Integer > um = new HashMap < Integer , Integer > ( ) ; int mod_arr [ ] = new int [ n ] ; int max = 0 ; int curr_sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) { curr_sum += arr [ i ] ; mod_arr [ i ] = ( ( curr_sum % k ) + k ) % k ; } for ( int i = 0 ; i < n ; i ++ ) { if ( mod_arr [ i ] == 0 ) max = i + 1 ; else if ( um . containsKey ( mod_arr [ i ] ) == false ) um . put ( mod_arr [ i ] , i ) ; else if ( max < ( i - um . get ( mod_arr [ i ] ) ) ) max = i - um . get ( mod_arr [ i ] ) ; } return max ; }
(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) dimensions: (dimensions) 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))) (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 (expression_statement (assignment_expression left: (identifier) right: (array_access array: (identifier) index: (identifier)))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (identifier))) right: (identifier)))))) (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 (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)))) right: (false))) consequence: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier)) (identifier)))) alternative: (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 (array_access array: (identifier) index: (identifier)))))))) consequence: (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)))))))))))) (return_statement (identifier))))