static long gcd ( long x , long y ) {
  if ( x == 0 ) return y ;
  if ( y == 0 ) return x ;
  if ( x > y ) return gcd ( x % y , y ) ;
  else return gcd ( x , y % x ) ;
}

static long gcd ( long x , long y ) { if ( x == 0 ) return y ; if ( y == 0 ) return x ; if ( x > y ) return gcd ( x % y , y ) ; else return gcd ( x , y % x ) ; }
(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: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)) (identifier)))) alternative: (return_statement (method_invocation name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (identifier))))))))