UMBC
CMSC 201 Fall '05
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Search Notes:
log to the base 2
How many times can you divide N things in half?
N/2/2/2/2/2/2/.../2 = a |_________________| k times
N * 2
(-k)
= 1
N = 2
k
k = log
2
(N)
How many accesses will it take to find X as we increase N ?
N
log
2
(N)
1
1
10
3
100
7
1000
10
1000000
20
Last Modified - Sunday, 25-Sep-2005 08:57:15 EDT
CSEE
|
201
|
201 F'05
|
lectures
|
news
|
help