static void Init ( int n ) {
  fact = new long [ n ] ;
  inv = new long [ n ] ;
  fact [ 0 ] = inv [ 0 ] = 1 ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    fact [ i ] = ( fact [ i - 1 ] * i ) % mod ;
    inv [ i ] = power ( fact [ i ] , mod - 2 ) ;
  }
}

static void Init ( int n ) { fact = new long [ n ] ; inv = new long [ n ] ; fact [ 0 ] = inv [ 0 ] = 1 ; for ( int i = 1 ; i < n ; i ++ ) { fact [ i ] = ( fact [ i - 1 ] * i ) % mod ; inv [ i ] = power ( fact [ i ] , mod - 2 ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (expression_statement (assignment_expression left: (identifier) right: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (expression_statement (assignment_expression left: (identifier) right: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) 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: (binary_expression left: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier))) right: (identifier)))) (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)) (binary_expression left: (identifier) right: (decimal_integer_literal))))))))))