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Oliver Eyton-Williams 0bd52f8bd1 Feat: add new Markdown parser (#39800 )

and change all the challenges to new `md` format.

2020-11-27 10:02:05 -08:00

id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
5900f3ab1000cf542c50febe	Problem 63: Powerful digit counts	5	302175

--description--

The 5-digit number, 16807 = 7⁵, is also a fifth power. Similarly, the 9-digit number, 134217728 = 8⁹, is a ninth power.

How many n-digit positive integers exist which are also an nth power?

--hints--

powerfulDigitCounts() should return a number.

assert(typeof powerfulDigitCounts() === 'number');

powerfulDigitCounts() should return 49.

assert.strictEqual(powerfulDigitCounts(), 49);

function powerfulDigitCounts() {

  return true;
}

powerfulDigitCounts();

// solution required