1: Create a function to find the maximum length of a subarray with at most k even numbers.

2: Implement a program to count the number of ways to climb stairs with 1 to k steps at a time.

3: Write a function to find the minimum number of operations to convert one string to another using insertions, deletions, and substitutions.

4: Create a program to find the longest palindromic substring in a given string.

5: Implement a function to determine the number of unique paths in a grid with obstacles.

6: Write a program to find the longest increasing subsequence in a matrix.

7: Create a function to find the minimum cost to make a string palindrome.

8: Implement a program to find the number of ways to form a target sum using an array of numbers.

9: Write a function to calculate the maximum product of two non-overlapping subarrays.

10: Create a program to find the longest substring that contains at most two distinct characters.