static int nCr ( int n , int r ) {
  if ( r > n ) return - 1 ;
  if ( n == r ) return 1 ;
  if ( r == 0 ) return 1 ;
  return nCr ( n - 1 , r - 1 ) + nCr ( n - 1 , r ) ;
}

static int nCr ( int n , int r ) { if ( r > n ) return - 1 ; if ( n == r ) return 1 ; if ( r == 0 ) return 1 ; return nCr ( n - 1 , r - 1 ) + nCr ( n - 1 , r ) ; }
(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: (identifier))) consequence: (return_statement (unary_expression operand: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (return_statement (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (return_statement (decimal_integer_literal))) (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)) (identifier)))))))