msb-public
/
tech-interview-handbook
mirror of https://github.com/yangshun/tech-interview-handbook
2
1
Code Issues Projects Releases Wiki Activity

contents: add tip on traversing arrays (#171)

Browse Source
pull/172/head
Rafat Bin Islam 4 years ago committed by GitHub
parent d355e90f50
commit 256c3847fe
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File

2
contents/algorithms/array.md
Unescape View File

@ -13,6 +13,8 @@ For questions where summation or multiplication of a subarray is involved, pre-c
If you are given a sequence and the interviewer asks for O(1) space, it might be possible to use the array itself as a hash table. For example, if the array only has values from 1 to N, where N is the length of the array, negate the value at that index (minus one) to indicate presence of that number. If you are given a sequence and the interviewer asks for O(1) space, it might be possible to use the array itself as a hash table. For example, if the array only has values from 1 to N, where N is the length of the array, negate the value at that index (minus one) to indicate presence of that number.
Also O(n) doesn't mean you can only traverse the array once. Sometimes traversing the array more than once can help you solve the problem easily.
## Arrays are sequences ## Arrays are sequences
Are there duplicate values in the array, would it affect the answer? Are there duplicate values in the array, would it affect the answer?

Write Preview
Loading…
Cancel
Save