⭐️ # 題目敘述 Write a function createCounter . It should accept an initial integer init . It should return an object with three functions. The three functions are: increment() increases the current value by 1 and then returns it. decrement() reduces the current value by 1 and then returns it. reset()...

⭐️⭐️⭐️⭐️⭐️ # 題目敘述 You want to build some obstacle courses. You are given a 0-indexed integer array obstacles of length n , where obstacles[i] describes the height of the ith obstacle. For every index i between 0 and n - 1 (inclusive), find the length of the longest obstacle course in obstacles such...

⭐️⭐️⭐️ # 題目敘述 You are given an array of integers nums and an integer target . Return the number of non-empty subsequences of nums such that the sum of the minimum and maximum element on it is less or equal to target . Since the answer may be too large, return it modulo 10^9 + 7 . # Example...

⭐️ # 題目敘述 Given an integer n , return a counter function. This counter function initially returns n and then returns 1 more than the previous value every subsequent time it is called ( n , n + 1 , n + 2 , etc). # Example 1: Input: n =...

⭐️⭐️ # 題目敘述 Given a string s and an integer k , return the maximum number of vowel letters in any substring of s with length k . Vowel letters in English are 'a' , 'e' , 'i' , 'o' , and 'u' . # Example 1: Input: s = "abciiidef", k =...

⭐️ # 題目敘述 Write a function createHelloWorld . It should return a new function that always returns "Hello World" . # Example 1: Input: args = [] Output: "Hello World" Explanation: const f = createHelloWorld(); f(); // "Hello World" The function...

⭐️⭐️⭐️ # 題目敘述 In the world of Dota2, there are two parties: the Radiant and the Dire. The Dota2 senate consists of senators coming from two parties. Now the Senate wants to decide on a change in the Dota2 game. The voting for this change is a round-based procedure. In each round, each senator can...

⭐️ # 題目敘述 Given two 0-indexed integer arrays nums1 and nums2 , return a list answer of size 2 where: answer[0] is a list of all distinct integers in nums1 which are not present in nums2 . answer[1] is a list of all distinct integers in nums2 which are not present in nums1 . Note that the integers...

⭐️ # 題目敘述 There is a function signFunc(x) that returns: 1 if x is positive. -1 if x is negative. 0 if x is equal to 0 . You are given an integer array nums . Let product be the product of all values in the array nums . Return signFunc(product) . # Example 1: Input: nums =...

⭐️ # 題目敘述 You are given an array of unique integers salary where salary[i] is the salary of the ith employee. Return the average salary of employees excluding the minimum and maximum salary. Answers within 10-5 of the actual answer will be accepted. # Example 1: Input: salary =...