You are given a 0-indexed array nums consisting of positive integers. You can choose two indices i and j, such that i != j, and the sum of digits of the number nums[i] is equal to that of nums[j]

You are given a 0-indexed integer array nums. A pair of indices (i, j) is a bad pair if i < j and j - i != nums[j] - nums[i]. Return the total number of bad pairs in nums. Example 1:Input: num

Design a number container system that can do the following:Insert or Replace a number at the given index in the system.Return the smallest index for the given number in the system. Implement the Numbe

A 0-indexed array derived with length n is derived by computing the bitwise XOR (⊕) of adjacent values in a binary array original of length n. Specifically, for each index i in the range [0, n - 1]:If

You are given an array arr of positive integers. You are also given the array queries where queries[i] = [left, right]. For each query i compute the XOR of elements from left to right (that is, a

You are given a 0-indexed array nums of integers. A triplet of indices (i, j, k) is a mountain if:i < j < knums[i] < nums[j] and nums[k] < nums[j]Return the minimum possible sum of a mount

You are given a binary string s and an integer k. A binary string satisfies the k-constraint if either of the following conditions holds:The number of 0’s in the string is at most k.The number of 1’s

Given a string s and an integer k, return the total number of substrings of s where at least one character appears at least k times. Example 1:Input: s = “abacb”, k = 2Output: 4 Explanation:

You are given a 0-indexed array nums and a non-negative integer k. In one operation, you can do the following:Choose an index i that hasn’t been chosen before from the range [0, nums.length - 1].Repla

You are given an integer array nums and an integer k. The frequency of an element x is the number of times it occurs in an array. An array is called good if the frequency of each element in this array