Importance of data structures and algorithms

If we consider our real-life situation with computers, we also use different sorts of arrangements of our belongings and data so that we can use them efficiently or find them easily when needed. What if we enter our phone contact book in a random order? Will we be able to find a contact easily? We might end up searching each and every contact in the book as the contacts are not arranged in a particular order. Just consider the following two images:

One shows that the books are scattered and finding a particular book will take time as the books are not organized. The other one shows that the books ...

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