Lecture 1
Getting Started with DSA
If you are new to programming, grab a pen and paper and let’s dive in! The intent of this course is to
prepare you to easily solve any DSA question that comes up in online tests or interviews. You should be
able to provide optimal solutions to these problems.
Problem:Given a set of values, how do we approach the problem and write code to solve it?
Solution:Analyze the problem: Before writing any code, it’s important to understand the problem and
break it down into smaller, manageable parts. This involves identifying the Inputs and expected outputs,
as well as any constraints or requirements.
Choose an appropriate algorithm: Once we have a clear understanding of the problem, we can choose
an algorithm that fits our requirements. This may involve researching different algorithms and their time
and space complexities.
Write pseudocode: Before writing actual code, it’s useful to write out the steps we need to take in plain
English. This helps us to organize our thoughts and ensure that we are on the right track before we start
coding.
Write code: Finally, we can write the actual code to solve the problem. This may involve debugging and
testing to ensure that the code works as expected.
Example code:
Def example_function(input): # Step 1: Analyze the problem # Identify inputs and expected outputs
# Consider any constraints or requirements # Step 2: Choose an appropriate algorithm # Research
different algorithms and their complexities # Step 3: Write pseudocode # Break problem down into
smaller steps # Organize thoughts and ensure on right track # Step 4: Write code # Solve problem
using chosen algorithm # Debug and test code return output
Here's a problem and its solution:
First, we’ll come up with a rough solution using pseudocode or a flowchart.
Then, we’ll write the actual code for it using a high-level language.
However, computers only understand 0s and 1s, so we need to convert our code into a machine-
readable format.
Once we do that, our program becomes executable.
For example, if we wrote a program to add a+b and want to print the answer, we need to make sure it’s
in a format the computer can understand.
Getting Started with DSA
If you are new to programming, grab a pen and paper and let’s dive in! The intent of this course is to
prepare you to easily solve any DSA question that comes up in online tests or interviews. You should be
able to provide optimal solutions to these problems.
Problem:Given a set of values, how do we approach the problem and write code to solve it?
Solution:Analyze the problem: Before writing any code, it’s important to understand the problem and
break it down into smaller, manageable parts. This involves identifying the Inputs and expected outputs,
as well as any constraints or requirements.
Choose an appropriate algorithm: Once we have a clear understanding of the problem, we can choose
an algorithm that fits our requirements. This may involve researching different algorithms and their time
and space complexities.
Write pseudocode: Before writing actual code, it’s useful to write out the steps we need to take in plain
English. This helps us to organize our thoughts and ensure that we are on the right track before we start
coding.
Write code: Finally, we can write the actual code to solve the problem. This may involve debugging and
testing to ensure that the code works as expected.
Example code:
Def example_function(input): # Step 1: Analyze the problem # Identify inputs and expected outputs
# Consider any constraints or requirements # Step 2: Choose an appropriate algorithm # Research
different algorithms and their complexities # Step 3: Write pseudocode # Break problem down into
smaller steps # Organize thoughts and ensure on right track # Step 4: Write code # Solve problem
using chosen algorithm # Debug and test code return output
Here's a problem and its solution:
First, we’ll come up with a rough solution using pseudocode or a flowchart.
Then, we’ll write the actual code for it using a high-level language.
However, computers only understand 0s and 1s, so we need to convert our code into a machine-
readable format.
Once we do that, our program becomes executable.
For example, if we wrote a program to add a+b and want to print the answer, we need to make sure it’s
in a format the computer can understand.
