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Level 2

Math

TUTORIALS

1. Math Introduction View Tutorial

2. Factorization View Tutorial

3. Base number system View Tutorial

4. Unary number system View Tutorial

5. Binary number system View Tutorial

6. Base conversions for base N View Tutorial

Primers

Examples

Binary Representation

Adhoc

Problem	Score	Companies	Time	Status
Prime Sum	150	Epic systems	41:36
Sum of pairwise Hamming Distance	200		54:07
FizzBuzz	200		11:53
Power Of Two Integers	250	Housing Amazon	37:33

Base conversion

Problem	Score	Companies	Time	Status
Excel Column Number	175	Amazon	23:00
Excel Column Title	175	Amazon	38:35

Digit op

Problem	Score	Companies	Time	Status
Palindrome Integer	200	HCL	17:09
Reverse integer	200	HCL Bloomberg	27:28

Number theory

Problem	Score	Companies	Time	Status
Greatest Common Divisor	200	NetApp	10:44
Trailing Zeros in Factorial	250	Jabong Zillow	18:01
Sorted Permutation Rank	250	Housing Zenefits	65:44
Largest Coprime Divisor	250		43:06
Sorted Permutation Rank with Repeats	500	Housing Zenefits	67:05

Array dp

Problem	Score	Companies	Time	Status
Numbers of length N and value less than K	200		82:56

Number encoding

Problem	Score	Companies	Time	Status
Rearrange Array	250		47:25

Combinatorics

Problem	Score	Companies	Time	Status
Grid Unique Paths	375	Amazon Adobe	31:47