xinyu04

摘要： Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i]. The produc 阅读全文

摘要： Given the head of a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. Return the 阅读全文

摘要： Three men walk into a motel and ask for a room. The desk clerk says a room is 30 so each man pays 10 towards the cost. Later, the clerk realizes he ma 阅读全文

摘要： At McDonalds you can order Chicken McNuggets in boxes of $6$, $9$, and $20$. What is the largest number such that you can not order any combination of 阅读全文

摘要： Given an integer array nums, find a contiguous non-empty subarray within the array that has the largest product, and return the product. The test case 阅读全文

摘要： Given an integer $n$, return the number of prime numbers that are strictly less than $n$. Solution 统计小于 $n$ 的素数个数。这里用欧拉筛来筛素数，$is_prime$ 用来记录该数是否为素数，$p 阅读全文

摘要： A peak element is an element that is strictly greater than its neighbors. Given a $0$-indexed integer array nums, find a peak element, and return its 阅读全文

摘要： Suppose an array of length $n$ sorted in ascending order is rotated between $1$ and $n$ times. For example, the array nums = [0,1,2,4,5,6,7] might bec 阅读全文

摘要： Given an integer array nums where the elements are sorted in ascending order, convert it to a height-balanced binary search tree. A height-balanced bi 阅读全文

摘要： Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. This matrix has the following properties: Integers in 阅读全文