The document provides information on how to write beautiful code and learn algorithms. It discusses puzzles and programming, learning algorithms through books and websites, using inbuilt data structures in languages like C++ and Java, sample problems to practice, and thanks the reader.

1. How to write a beautiful
code.
TARUN GOYAL
SOFTWARE ENGINEER
WALMARTLABS

2. Alien Spiral
Given size N output an N*N matrix where numbers
are arranged in a spiral.
Pattern:
1
2
3
4
5
6
7
8
28
29
30
31
32
33
34
9
27
48
49
50
51
52
35
10
26
47
60
61
62
53
36
11
25
46
59
64
63
54
37
12
24
45
58
57
56
55
38
13
23
44
43
42
41
40
39
14
22
21
20
19
18
17
16
15
Link: http://www.codechef.com/INSOM1/problems/INSOMA1

3. Puzzles and Programming
 Both have constraints.
 Have to devise a logic to solve them.
 Puzzles on paper, coding on computer.
 Solving puzzles can’t get you a job but coding can.

4. Learning Algorithms
Books:
 Algorithms by Sanjoy Dasgupta (link)
 Introduction to Algorithms 3 Edition (link)

5. Websites
Practice sites:
 Codechef: http://www.codechef.com
 Spoj: https://www.spoj.com
 Codeforces: http://codeforces.com
 Topcoder: http://www.topcoder.com
Practice and hiring challenges
 HackerEarth: http://www.hackerearth.com

6. Use Inbuilt Data Structures
 Standard template library in C++:
http://www.cplusplus.com/reference/stl/
 Collections in java:
http://docs.oracle.com/javase/7/docs/technotes/gui
des/collections/
 Example: sort (a,a+n) in c++ will sort an entire array
of numbers.

7. Sample Problems
http://www.hackerearth.com/problem/algorithm/fin
ding-pairs-4/
http://www.hackerearth.com/problem/algorithm/ch
ocolates-boxes-1/
http://www.hackerearth.com/problem/algorithm/sav
e-girlfriend/

8. Thank You !