usmanovrustam

int multiplicativePersistence(int value) {
  int counts = 0;
  int temp;
  while (value > 9) {
    temp = 1;
    while (value > 0) {
      temp *= value % 10;
      value = (value ~/ 10);
    }
    value = temp;

usmanovrustam

int sumOf(List<int> integers) {
  int result = 0;
  for (var i = 0; i < integers.length; i++) {
    result += integers[i];
  }
  return result;
}

usmanovrustam

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

usmanovrustam

Privacy Policy for Brain Blitz
Last Updated: December 29, 2025

This Privacy Policy describes how Rustam Usmanov ("we," "us," or "our") collects, uses, and discloses your information when you use our mobile application, Brain Blitz (the "App").

By using the App, you consent to the collection and use of your information as described in this policy.

1. Information We Collect
A. Information You Provide
Account Information: When you sign in using Apple, Google, or Facebook, we collect your name, email address, and profile photo handle to authenticate you and create your player profile.

usmanovrustam

Data Deletion Instructions
Last Updated: December 29, 2025

According to the Facebook Platform rules, we provide the following instructions for users who wish to delete their data from Brain Blitz.

How to Request Data Deletion
Since Brain Blitz is a mobile application, we do not currently have a fully automated web portal for deletion. However, you can request the complete deletion of your account and all associated data by following these steps:

Email Support: Send an email to our support team at [email protected].
Subject Line: Please use the subject line: "Request for Account Deletion - Brain Blitz".