Fast Bit Counting

Points: 3 (partial)

Time limit: 0.5s

Memory limit: 64M

Author:

Problem type

Allowed languages

C, C++

Given 64-bit unsigned integers, count the bits set in each one.

One function:

int setbits(unsigned long long);

Your function may be called up to $10^8$ ~10^8~ times.

Your code must be less than 560 characters in length. 560 characters is plenty for any sane solution. Otherwise, only half of the points are awarded.

Comments

0

Dingledooper commented on Aug. 12, 2023, 11:28 p.m.

Is this intentional, or a fundamental flaw in the system?

0

BalintR commented on Aug. 13, 2023, 11:19 a.m.

The grader has been updated so that the grader's process never actually computes the answer. Similar exploits should no longer be possible.

32

d commented on April 23, 2020, 6:34 p.m.

Hint for this problem: https://www.youtube.com/watch?v=u5IyYNI28gM