freeCodeCamp

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id	challengeType	title	forumTopicId
5900f43a1000cf542c50ff4d	5	Problem 206: Concealed Square	301847

Description

Find the unique positive integer whose square has the form 1_2_3_4_5_6_7_8_9_0, where each “_” is a single digit.

tests:
  - text: <code>euler206()</code> should return 1389019170.
    testString: assert.strictEqual(euler206(), 1389019170);

function euler206() {
  // Good luck!
  return true;
}

euler206();

// solution required