1802. Maximum Value at a Given Index in a Bounded Array
You are given three positive integers:n, index, and maxSum. You want to construct an array nums (0-indexed) that satisfies the following conditions:
159. Longest Substring with At Most Two Distinct Characters
Given a string s, return the length of the longest that contains at most two distinct characters .
1530. Number of Good Leaf Nodes Pairs
You are given the root of a binary tree and an integer distance. A pair of two different leaf nodes of a binary tree is said to be good if the length of the shortest path between them is less than or equal to distance.
3474. Lexicographically Smallest Generated String
You are given two strings, str1 and str2, of lengths n and m, respectively.
694. Number of Distinct Islands
You are given an m x n binary matrix grid. An island is a group of 1‘s (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four edges of the grid are surrounded by water.
1797. Design Authentication Manager
There is an authentication system that works with authentication tokens. For each session, the user will receive a new authentication token that will expire timeToLive seconds after the currentTime. If the token is renewed, the expiry time will be extended to expire timeToLive seconds after the (potentially different) currentTime.
1079. Letter Tile Possibilities
You have n``tiles, where each tile has one letter tiles[i] printed on it.