Question

Write a sort program that the sorts the numbers in the list L in O(N) time and places the sorted list in S. Hint, use the code from the previous question. def MyHash(L,N): hash_table=f for i in range(N): hash_table[L[i]] = i return hash_table L=[5,2,0,1,4,3] N= len (L) hash_table = MyHash (L,N) print("Hash Table: ", hash_table) find_item=2 index=hash_table.get(find_item) print(index) Write a program that takes a list of integer numbers L from 0 to N in any order, and hashes in such that any value can be located in O(1). Once the hash table is created you should be able to return the index of the search item. Show an example of the code working.

Answer 1

To create a hash table for efficient O(1) indexing, you can modify the provided code as follows:

```python

def MyHash(L, N):

hash_table = [None] * N

for i in range(N):

hash_table[L[i]] = i

return hash_table

L = [5, 2, 0, 1, 4, 3]

N = len(L)

hash_table = MyHash(L, N)

search_item = 2

index = hash_table[search_item]

print("Index of", search_item, "is:", index)

```

This program creates a hash table using the given list `L`, allowing you to quickly locate an item's index with O(1) time complexity. In the example, the index of the search item '2' is retrieved and printed.

Step-by-step explanation:

The provided code defines a function `MyHash` that takes a list `L` and its length `N`, creating a hash table where the indices correspond to the values in `L`. Each element in the hash table holds the index of the corresponding value. The modified code initializes an empty hash table of size `N` and populates it by iterating through the list `L`. The resulting hash table allows for direct indexing of items.

In the example, the list `L` is [5, 2, 0, 1, 4, 3], and the hash table is created using the `MyHash` function. The index of the search item '2' is then obtained from the hash table, demonstrating the O(1) time complexity for item retrieval. This approach provides a fast and efficient way to find the index of any value in the given list.

In summary, the modified program efficiently creates a hash table and demonstrates O(1) indexing, making it a practical solution for quickly locating items in a list with minimal time complexity.