freeCodeCamp/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.english.md at 81a0c0c8e07a6c3a4f99228a8af10967fa0c53d9

Valeriy 79d9012432 fix(curriculum): quotes in tests (#18828 )

* fix(curriculum): tests quotes

* fix(curriculum): fill seed-teardown

* fix(curriculum): fix tests and remove unneeded seed-teardown

2018-10-20 23:32:47 +05:30

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id, challengeType, title

id	challengeType	title
5900f4151000cf542c50ff28	5	Problem 169: Exploring the number of different ways a number can be expressed as a sum of powers of 2

Description

Define f(0)=1 and f(n) to be the number of different ways n can be expressed as a sum of integer powers of 2 using each power no more than twice. For example, f(10)=5 since there are five different ways to express 10: 1 + 1 + 8 1 + 1 + 4 + 41 + 1 + 2 + 2 + 4 2 + 4 + 4 2 + 8 What is f(1025)?

Instructions

Tests

tests:
  - text: <code>euler169()</code> should return 178653872807.
    testString: assert.strictEqual(euler169(), 178653872807, '<code>euler169()</code> should return 178653872807.');

Challenge Seed

function euler169() {
  // Good luck!
  return true;
}

euler169();

Solution

// solution required

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