xinyu04

摘要： You are given a list of songs where the ith song has a duration of time[i] seconds. Return the number of pairs of songs for which their total duration 阅读全文

摘要： Given the root of a binary tree, the level of its root is 1, the level of its children is 2, and so on. Return the smallest level x such that the sum 阅读全文

摘要： There is a one-dimensional garden on the x-axis. The garden starts at the point 0 and ends at the point n. (i.e The length of the garden is n). There 阅读全文