This problem deals with determining whether or not a given string is a palindrome. This is done by considering only alphanumeric characters and ignoring cases. An empty string is considered a valid palindrome.

171

Oct 22
This problem asks whether a given string is a permutation of a palindrome. A palindrome is a word or phrase that is the same forwards and backwards, while a permutation is a rearrangement of letters. The palindrome does not need to be limited to just dictionary words.

134

Oct 22
This function checks if a given string is a permutation of a palindrome. A palindrome is a word or phrase that is the same forwards and backwards, while a permutation is a rearrangement of letters. The palindrome does not need to be limited to just dictionary words.

117

Oct 22
This problem asks you to return the sum of the elements in an array. For example, given the input [1, 2, 3], the output would be 6.

169

Oct 22
The problem is to find the first non-repeating character in a string. The input is a string and the output is the first non-repeating character in the string.

179

Oct 22
The "Two Sum" problem asks us to find the indices of two numbers in an array that add up to a specific target. We are given that each input has exactly one solution, and we cannot use the same element twice. An example is provided, where the array is [2, 7, 11, 15] and the target is 9. The solution in this case is [0 , 1], since 2 + 7 = 9.

168

Oct 22
This problem deals with determining whether an array contains duplicates. The function should return true if any element appears more than once in the array, and false if every element is distinct.

125

Oct 21
Given an array of n integers, this code problem finds the contiguous subarray of given length k that has the maximum average value. The output is the maximum average value.

170

Oct 21