Count Distinct Elements in Every Window of Size K in Python
2 min readOct 15, 2024
Program Explanation
This program counts the number of distinct elements in each window of size k
in a given list of integers. It uses a sliding window approach combined with a hash map to keep track of element counts efficiently.
Program Structure
- Function Definition: The main functionality is encapsulated in the function
count_distinct_in_window(arr, k)
.
Parameters:
arr
: A list of integers in which to count distinct elements.k
: The size of the window to consider.
Logic:
- Use a hash map (dictionary) to store the count of each element in the current window.
- Iterate through the array using a sliding window technique to update counts and track distinct elements.
- Output the count of distinct elements for each window.
Python Code
def count_distinct_in_window(arr, k):
"""
Count distinct elements in every window of size k in the array.
Parameters:
arr (list): List of integers.
k (int): Size of the sliding window.
Returns:
list: A list containing the count of distinct elements for each window.
"""
if k <=…