class Euler36 {

    private static class Options {
        int limit = 1000000;
        boolean runCheckpoints = true;
    }

    private static boolean parseIntAfterPrefix(String arg, String prefix, Options options) {
        if (!arg.startsWith(prefix)) {
            return false;
        }
        String tail = arg.substring(prefix.length());
        if (tail.isEmpty()) {
            return false;
        }

        int parsed = 0;
        for (int i = 0; i < tail.length(); i++) {
            char c = tail.charAt(i);
            if (c < '0' || c > '9') {
                return false;
            }
            parsed = parsed * 10 + (c - '0');
        }
        options.limit = parsed;
        return true;
    }

    private static boolean parseArguments(String[] args, Options options) {
        for (String arg : args) {
            if (arg.equals("--skip-checkpoints")) {
                options.runCheckpoints = false;
                continue;
            }
            if (parseIntAfterPrefix(arg, "--limit=", options)) {
                continue;
            }

            System.err.println("Unknown argument: " + arg);
            return false;
        }
        return options.limit >= 1;
    }

    private static boolean isPalindrome(String s) {
        for (int i = 0; i < s.length() / 2; ++i) {
            if (s.charAt(i) != s.charAt(s.length() - 1 - i)) {
                return false;
            }
        }
        return true;
    }

    private static String toBinary(int value) {
        if (value == 0) {
            return "0";
        }
        StringBuilder out = new StringBuilder();
        while (value > 0) {
            out.append((value & 1) != 0 ? '1' : '0');
            value >>= 1;
        }
        return out.reverse().toString();
    }

    private static long solve(int limit) {
        long total = 0;
        for (int n = 1; n < limit; ++n) {
            if (isPalindrome(Integer.toString(n)) && isPalindrome(toBinary(n))) {
                total += n;
            }
        }
        return total;
    }

    private static boolean runCheckpoints() {
        if (solve(1000) != 1772L) {
            System.err.println("Checkpoint failed for limit=1000");
            return false;
        }
        if (!isPalindrome("12321")) {
            System.err.println("Checkpoint failed for palindrome helper");
            return false;
        }
        return true;
    }

    public static void main(String[] args) {
        Options options = new Options();
        if (!parseArguments(args, options)) {
            System.exit(1);
        }
        if (options.runCheckpoints && !runCheckpoints()) {
            System.exit(2);
        }

        System.out.println(solve(options.limit));
    }
}