Materi Informatika Algoritma Pengurutan Angka dengan Insertion Sort

Summary

In this video, Pak Izam introduces the insertion sort algorithm, demonstrating how data can be sorted step by step. The process starts by comparing the leftmost data of an unsorted list with the already sorted portion. As each new number is examined, it is inserted in its correct position in the sorted section. This method continues until the entire list is ordered. Through a practical example, Pak Izam clearly illustrates how insertion sort works, making it easy to understand the process of sorting by incremental comparisons and insertions.

Takeaways

• 😀 Insertion Sort begins with two parts: the sorted portion (left) and the unsorted portion (right).
• 😀 The first element of the unsorted portion is taken and compared to the sorted portion.
• 😀 If the element is smaller than any element in the sorted portion, it is inserted at the correct position.
• 😀 The insertion process is repeated for each new element in the unsorted portion.
• 😀 Insertion Sort continues by progressively increasing the size of the sorted portion.
• 😀 The insertion process ensures the data is arranged in ascending order after each step.
• 😀 Data is compared with the sorted elements, and if needed, elements are shifted to make room for the new one.
• 😀 At each step, the left portion becomes larger, and the right portion gets smaller.
• 😀 Insertion Sort is a simple, efficient sorting method for small datasets or nearly sorted data.
• 😀 After all elements are sorted, the final result is a fully ordered list in ascending order.

Q & A

What is the main algorithm discussed in this script?

The main algorithm discussed is the Insertion Sort algorithm.

How does the Insertion Sort algorithm work?

Insertion Sort works by dividing the data into two parts: a sorted part and an unsorted part. It repeatedly takes the leftmost element of the unsorted part and inserts it into the correct position in the sorted part.

What is the initial condition in the Insertion Sort algorithm?

The initial condition is that the data is divided into two parts: the leftmost part is assumed to be sorted, while the right part is unsorted.

How is the first element chosen in Insertion Sort?

The first element of the unsorted part is chosen, and it is compared with the elements in the sorted part to determine where it should be inserted.

What happens if the element being compared is smaller than the elements in the sorted part?

If the element is smaller, it is inserted into the sorted part before the element it is smaller than.

Can you explain how the number 1 is inserted in the example provided?

In the example, the number 1 is compared with the elements in the sorted part. It is inserted before the number 3, resulting in the sorted data being [1, 3, 5, 4, 7, 26].

How does the sorted part evolve in Insertion Sort?

As elements are taken from the unsorted part, they are inserted into the sorted part, making the sorted part grow in size while the unsorted part shrinks.

What happens when the number 4 is inserted?

The number 4 is inserted between 3 and 5, resulting in the sorted part being [1, 3, 4, 5] and the unsorted part being [7, 26].

What is the final state of the data after applying the Insertion Sort algorithm in this example?

The final sorted data is [1, 2, 3, 4, 5, 6, 7], with all elements correctly ordered.

What is the significance of the comparison between elements in the sorted part and the unsorted part?

The comparison determines where the current element should be inserted within the sorted part, ensuring that the sorted part remains in order as the algorithm progresses.