Sunday May 10, 2009
This mathematical problem is gauged to test your ability to code up simple problems in an efficient way.
Description
Given the rules for a sequence:
If n is even: n = n / 2
If n is odd: n = 3n + 1
For example, if the starting number is 5 the sequence is:
5 > 16 > 8 > 4 > 2 > 1
Find the largest starting number under ten million that will generate the longest run of this sequence and ends in 1.
The sequence in question is called the Collatz Problem and is thought to always terminate.
Notes:
*Because integers in the sequence can reach numbers greater than 32 bits, noninteger or largerthan32 bit integers may be required, depending on the implementation.
Show solution
Challenge Resources:
©19942015

Shodor

Privacy Policy

NSDL

XSEDE

Blue Waters

ACM SIGHPC





Not Logged In. Login