freeCodeCamp/curriculum/challenges/en/08-coding-interview-prep/project-euler/problem-290-digital-signature.en.md

id, challengeType, title

id	challengeType	title
5900f48f1000cf542c50ffa1	5	Problem 290: Digital Signature

Description

How many integers 0 ≤ n < 1018 have the property that the sum of the digits of n equals the sum of digits of 137n?

Instructions

Tests

- text: <code>euler290()</code> should return 20444710234716470.
  testString: 'assert.strictEqual(euler290(), 20444710234716470, ''<code>euler290()</code> should return 20444710234716470.'');'

Challenge Seed

function euler290() {
  // Good luck!
  return true;
}

euler290();

Solution

// solution required