# Sum of length of subsets which contains given value K and all elements in subsets are less than equal to K.

**Objective: **Given an array of numbers and integer K. Your task is to find lengths of all the subsets which contain value K and all elements in the subset are less than equal to K.

**Example:**

Given Input: [1, 5, 2, 3, 8, 6, 2, 4, 9, 5, 2], and K = 5 Length of subsets(all elements <= k) which contains K: 6 Explanation: subset {1, 5, 2, 4} , length=4 subset {5, 2} , length=2 Output: 2+4 = 6 Given Input: [1, 5, 2, 3, 8, 6, 2, 4, 9, 5, 2], and K = 9 Length of subsets(all elements <= k) which contains K: 11 All elements are less than 9 so array length is our result.

**Naive Approach: **Use nested loops, get all the subsets with all the elements less than k and pick the ones which contain value k and add their length to answer.

**Time Complexity: O(N ^{2})**

**Better Approach: **

- Initialize
*currentLength = 0, answer = 0, kPresent = false.* - Iterate through the input array.
- If current element is <= k
- Increment currentLength by 1.
- If current element == k, do
.*kPresent = true*

- Else
- Check if
= true then add*kPresent*to answer.*currentLength* - Reset
*currentLength = 0, kPresent = false*

- Check if

- If current element is <= k
- Handle the edge case, if
then add currentLength to answer.*kPresent = true* - Return the answer.

**Time Complexity: O(N)**

**Complete Code:**

**Output:**

Given Input: [1, 5, 2, 3, 8, 6, 2, 4, 9, 5, 2], and K = 5 Length of subsets(all elements <= k) which contains K