while fast and fast.next: slow = slow.next fast = fast.next.next
print(first_non_repeating_char("aabbc")) # Output: "c" Tcs Coding Questions 2021
Given an array of integers and a target sum, count the number of pairs with that sum. while fast and fast
return count
Given a string, check if it's a palindrome or not. Tcs Coding Questions 2021
print(is_palindrome("madam")) # Output: True
return None