freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-323-bitwise-or-operations-on-random-integers.md
Oliver Eyton-Williams ee1e8abd87
feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

949 B

id, title, challengeType, forumTopicId, dashedName
id title challengeType forumTopicId dashedName
5900f4b01000cf542c50ffc2 Problem 323: Bitwise-OR operations on random integers 5 301980 problem-323-bitwise-or-operations-on-random-integers

--description--

Let y0, y1, y2,... be a sequence of random unsigned 32 bit integers

(i.e. 0 ≤ yi < 232, every value equally likely).

For the sequence xi the following recursion is given:x0 = 0 and

xi = xi-1| yi-1, for i > 0. ( | is the bitwise-OR operator)

It can be seen that eventually there will be an index N such that xi = 232 -1 (a bit-pattern of all ones) for all i ≥ N.

Find the expected value of N. Give your answer rounded to 10 digits after the decimal point.

--hints--

euler323() should return 6.3551758451.

assert.strictEqual(euler323(), 6.3551758451);

--seed--

--seed-contents--

function euler323() {

  return true;
}

euler323();

--solutions--

// solution required