Why can’t I come up with a solution of algorithm design, but when I see the code I can understand everything? Are there any techniques I should work on?

It is common to struggle with algorithm design and problem-solving, especially when first starting out in programming. However, it’s a good sign that you can understand the code once you see it. Here are some techniques that can help you improve your algorithm design skills:

1. Break down the problem: Sometimes problems can seem overwhelming at first, but breaking them down into smaller, more manageable sub-problems can make them easier to solve. Try to identify the core components of the problem and then work on solving each of them one at a time.
2. Use examples and test cases: Use examples and test cases to understand the problem better and to verify that your algorithm works correctly. Start with simple cases and gradually increase the complexity to cover all possible scenarios.
3. Consider different approaches: There are often multiple ways to solve a problem, and it can be helpful to consider different approaches before settling on a solution. Think about the trade-offs between different algorithms, such as time complexity, space complexity, and readability.
4. Draw diagrams and visualize the problem: Drawing diagrams and visualizing the problem can help you understand it better and see patterns that might not be immediately obvious.
5. Practice, practice, practice: Like any skill, algorithm design takes practice to develop. Solve as many algorithm problems as you can and try to identify common patterns and techniques.
6. Learn from others: Study the solutions of other programmers to understand their thought process and learn new techniques. You can find solutions on programming websites such as LeetCode, HackerRank, and CodeWars.
7. Collaborate with others: Working with others can help you gain different perspectives and learn new approaches to problem-solving. Consider joining a programming group or finding a coding partner to work on problems together.

Remember that algorithm design is a skill that takes time and practice to develop. Be patient with yourself and keep practicing, and you will improve over time.