Count the number of possible triangles
Given an integer array arr[]. Find the number of triangles that can be formed with three different array elements as lengths […]
1408. String Matching in an Array
Given an array of string words, return all strings in words that is a substring of another word. You can return the answer in any order. A substring is
Pair with given sum in a sorted array
You are given an integer target and an array arr[]. You have to find number of pairs in arr[] which sums up to target. It is
1769. Minimum Number of Operations to Move All Balls to Each Box
You have n boxes. You are given a binary string boxes of length n, where boxes[i] is ‘0’ if the ith box is empty, and ‘1’ if it contains one ball. In one operation, you can
Sum Pair closest to target
Given an array arr[] and a number target, find a pair of elements (a, b) in arr[], where a<=b whose sum is closest to target.Note: Return the
2381. Shifting Letters II
You are given a string s of lowercase English letters and a 2D integer array shifts where shifts[i] = [starti, endi, directioni]. For every i, shift the characters
Count Pairs whose sum is less than target
Given an array arr[] and an integer target. You have to find the number of pairs in the array whose sum is strictly less
1930. Unique Length-3 Palindromic Subsequences
Given a string s, return the number of unique palindromes of length three that are a subsequence of s. Note that even if there are multiple ways
Count all triplets with given sum in sorted array
Given a sorted array arr[] and a target value, the task is to count triplets (i, j, k) of valid indices, such that arr[i] + arr[j] +
2270. Number of Ways to Split Array
You are given a 0-indexed integer array nums of length n. nums contains a valid split at index i if the following are true: The sum of the first i +
Count Subarrays with given XOR
Given an array of integers arr[] and a number k, count the number of subarrays having XOR of their elements as k. Examples: Input: arr[] =
2559. Count Vowel Strings in Ranges
You are given a 0-indexed array of strings words and a 2D array of integers queries. Each query queries[i] = [li, ri] asks us to find the