public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int num = sc . nextInt ( ) ;
  long array [ ] = new long [ num + 5 ] ;
  for ( int i = 1 ;
  i <= num ;
  i ++ ) {
    array [ i ] = i == 1 || i == 2 ? 0 : i == 3 ? 1 : array [ i - 1 ] + array [ i - 2 ] + array [ i - 3 ] ;
    array [ i ] = mod ( array [ i ] ) ;
  }
  System . out . println ( array [ num ] ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int num = sc . nextInt ( ) ; long array [ ] = new long [ num + 5 ] ; for ( int i = 1 ; i <= num ; i ++ ) { array [ i ] = i == 1 || i == 2 ? 0 : i == 3 ? 1 : array [ i - 1 ] + array [ i - 2 ] + array [ i - 3 ] ; array [ i ] = mod ( array [ i ] ) ; } System . out . println ( array [ num ] ) ; }
(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: (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) dimensions: (dimensions) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (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: (array_access array: (identifier) index: (identifier)) right: (ternary_expression condition: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (decimal_integer_literal) alternative: (ternary_expression condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) consequence: (decimal_integer_literal) alternative: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal)))))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation 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 (array_access array: (identifier) index: (identifier)))))))