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摘要： Your music player contains N different songs and she wants to listen to L (not necessarily different) songs during your trip. You create a playlist so 阅读全文

摘要： Given the head of a linked list, we repeatedly delete consecutive sequences of nodes that sum to 0 until there are no such sequences. After doing so, 阅读全文

摘要： Given an array of integers and an integer k, you need to find the total number of continuous subarrays whose sum equals to k. Example 1: Input:nums = 阅读全文

摘要： There are N wines in a row. Each year you sell either the leftmost or the rightmost wine. The i-th wine has initial price p[i] and price k * p[i] in t 阅读全文

摘要： In an infinite chess board with coordinates from -infinity to +infinity, you have a knight at square [0, 0]. A knight has 8 possible moves it can make 阅读全文

摘要： You have N stones in a row, and would like to create from them a pyramid. This pyramid should be constructed such that the height of each stone increa 阅读全文

摘要： A competitive runner would like to create a route that starts and ends at his house, with the condition that the route goes entirely uphill at first, 阅读全文

摘要： Given an array of integers, return the maximum sum for a non-empty subarray (contiguous elements) with at most one element deletion. In other words, y 阅读全文

摘要： On a mysterious island there are creatures known as Quxes which come in three colors: red, green, and blue. One power of the Qux is that if two of the 阅读全文

摘要： Given a string s, we make queries on substrings of s. For each query queries[i] = [left, right, k], we may rearrange the substring s[left], ..., s[rig 阅读全文