static void nQueens ( int k , int n ) {
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    if ( canPlace ( k , i ) ) {
      arr [ k ] = i ;
      if ( k == n ) {
        display ( n ) ;
      }
      else {
        nQueens ( k + 1 , n ) ;
      }
    }
  }
}

static void nQueens ( int k , int n ) { for ( int i = 1 ; i <= n ; i ++ ) { if ( canPlace ( k , i ) ) { arr [ k ] = i ; if ( k == n ) { display ( n ) ; } else { nQueens ( k + 1 , n ) ; } } } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (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 (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier)))) consequence: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (identifier))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier))))) alternative: (block (expression_statement (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (identifier))))))))))))