static int Hosoya ( int n , int m ) {
  if ( ( n == 0 && m == 0 ) || ( n == 1 && m == 0 ) || ( n == 1 && m == 1 ) || ( n == 2 && m == 1 ) ) return 1 ;
  if ( n > m ) return Hosoya ( n - 1 , m ) + Hosoya ( n - 2 , m ) ;
  else if ( m == n ) return Hosoya ( n - 1 , m - 1 ) + Hosoya ( n - 2 , m - 2 ) ;
  else return 0 ;
}

static int Hosoya ( int n , int m ) { if ( ( n == 0 && m == 0 ) || ( n == 1 && m == 0 ) || ( n == 1 && m == 1 ) || ( n == 2 && m == 1 ) ) return 1 ; if ( n > m ) return Hosoya ( n - 1 , m ) + Hosoya ( n - 2 , m ) ; else if ( m == n ) return Hosoya ( n - 1 , m - 1 ) + Hosoya ( n - 2 , m - 2 ) ; else return 0 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))))) consequence: (return_statement (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier))))) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (binary_expression left: (identifier) right: (decimal_integer_literal)))))) alternative: (return_statement (decimal_integer_literal))))))