static int printNthElement ( int n ) {
  int arr [ ] = new int [ n + 1 ] ;
  arr [ 1 ] = 1 ;
  arr [ 2 ] = 2 ;
  for ( int i = 3 ;
  i <= n ;
  i ++ ) {
    if ( i % 2 != 0 ) arr [ i ] = arr [ i / 2 ] * 10 + 1 ;
    else arr [ i ] = arr [ ( i / 2 ) - 1 ] * 10 + 2 ;
  }
  return arr [ n ] ;
}

static int printNthElement ( int n ) { int arr [ ] = new int [ n + 1 ] ; arr [ 1 ] = 1 ; arr [ 2 ] = 2 ; for ( int i = 3 ; i <= n ; i ++ ) { if ( i % 2 != 0 ) arr [ i ] = arr [ i / 2 ] * 10 + 1 ; else arr [ i ] = arr [ ( i / 2 ) - 1 ] * 10 + 2 ; } return arr [ n ] ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (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)))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (decimal_integer_literal))) (expression_statement (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 (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (decimal_integer_literal)))) alternative: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))) right: (decimal_integer_literal)) right: (decimal_integer_literal))))))) (return_statement (array_access array: (identifier) index: (identifier)))))