The document discusses data structures and algorithms (DSA). It defines an algorithm as a step-by-step procedure to solve problems and provides an example algorithm to find the largest number in a list. DSA involves using data structures like arrays, stacks and queues to efficiently solve problems. Common applications of DSA include search engines, social media, maps and e-commerce websites. The document assigns practice problems on employees earning and customers who never order, then provides feedback links and announces the next session date.

1. Road to GDSC

2. Welcome to the third session
Technical Skills

3. Introduction to
Data Structure Algorithms
&

4. What is
Algorithm?
● Algorithms are step-by-step
procedures for solving
problems.
● It takes a set of input(s) and
produces the desired output.

5. For Example :
Write an algorithm
to find the largest
number in a list of
numbers.

6. ● Step 1: Start
● Step 2: Begin from the first number in the collection Step 3: Assign it
to a variable called "largest".
● Step 3: Take the next number & compare with the "largest" variable.
● Step 4: If the current number is larger than the "largest" variable,
update the "largest" variable to the current number.
● Step 5: Continue Step 4 and 5 until all numbers have been compared.
● Step 6: Return "largest"
● Step 7: End
Algorithm to find the largest number in a collection:

7. What is DSA ?
DSA stands for
"Data Structures
& Algorithms."
Data structures
are different
ways of
organizing and
storing data.
Each data
structure has its
own strengths
and
weaknesses.
In DSA,
algorithms are
used to solve
problems
efficiently.

8. Is DSA important to
learn?
If yes, then Why?

9. Importance of DSA
Efficiency Problem Solving Optimization Scalability

10. Applications of
DSA
Search Engines Social Media
Network
Maps and
Navigation Apps
E-Commerce
Websites etc.

11. Classification of Data Structures :

12. Here’s an assignment for
you to practise what we
learned today!

13. Assignments
1. Link 1 -
https://leetcode.com/proble
ms/employees-earning-
more-than-their-managers/
1. Link 2 -
https://leetcode.com/proble
ms/customers-who-never-
order/

14. Let us know your
feedback on
today’s session
here.
https://forms.gle/WX
sxCoHTsJ2E9znE9

15. See you on
12th March
for the last session.
Thank You!

16. For Algorithms
1. Link 1 - https://leetcode.com/problems/binary-
tree-preorder-traversal/
2. Link 2 -
https://leetcode.com/problems/binary-tree-
postorder-traversal/