freeCodeCamp

1.2 KiB

Raw Blame History

id	challengeType	videoUrl	title
5900f4091000cf542c50ff1c	5		问题157：解决丢番图方程

Description

491/5000 考虑具有a，b，p，n个正整数且a≤b的双色子方程1 / a + 1 / b = p / 10n。对于n = 1，此等式有20个解决方案，如下所示： 1/1 + 1/1 = 20/10 1/1 + 1/2 = 15/10 1/1 + 1/5 = 12/10 1/1 + 1/10 = 11/10 1/2 + 1/2 = 10/10 1/2 + 1/5 = 7/10 1/2 + 1/10 = 6/10 1/3 + 1/6 = 5/10 1/3 + 1/15 = 4/10 1/4 + 1/4 = 5/10 1/4 + 1/20 = 3/10 1/5 + 1/5 = 4/10 1/5 + 1/10 = 3/10 1/6 + 1/30 = 2/10 1/10 + 1/10 = 2/10 1/11 + 1/110 = 1/10 1/12 + 1/60 = 1/10 1/14 + 1/35 = 1/10 1/15 + 1/30 = 1/10 1/20 + 1/20 = 1/10 对于1≤n≤9，该方程有多少个解？

Instructions

Tests

tests:
  - text: <code>euler157()</code>应返回53490。
    testString: assert.strictEqual(euler157(), 53490);

Challenge Seed

function euler157() {
  // Good luck!
  return true;
}

euler157();

Solution

// solution required

/section>

1.2 KiB Raw Blame History Unescape Escape