Getting started with New Week in Problem Solving

Hi, Folks! Today, I prepared a problem-solving plan for entire week and solved three problems on LeetCode: Swap nodes in pairs, Maximal rectangle, and Friends Of Appropriate Ages.

There are many things which we should keep in mind when preparing a plan. First, consider the concepts which you want to learn in problem solving and find all the related problems and choose the most conceptual among them. Add them one by one to your plan.

Make sure that chosen problems are of your skill range. This means problem should not be too hard or too easy. Gaining experience in that specific concept should be beneficial to you. Now, I do not mean that we should avoid hard problems or only solve problems of familiar level. Each day, ensure that you have 2 or 3 problems of the same level and 1 or 2 problems of a higher level. The problems of same level help you revise the concept and also to gain the confidence in problem-solving. The problems in higher level will help you understand the extent of difficulty a problem can have. So, including both level problems in daily plan is essential.

Swap node pairs : This is a linked list problem which we can be solved by interchanging the addresses of pair nodes.

Maximal Rectangle : This problem can be solved using the stack. Traverse through out the matrix. if you find one increment the count or else replace it with zero. Every time, update the stack with new value. In this way we can solve maximal rectangle problem.

Friends of Appropriate Ages: In this problem we can traverse through out given array of ages and check if the given constraints are getting satisfied. In this way we can solve this problem.

I hope my experiences will be helpful!

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