摘要：
A Range Module is a module that tracks ranges of numbers. Design a data structure to track the ranges represented as half-open intervals and query abo 阅读全文
摘要：
You are a hiker preparing for an upcoming hike. You are given heights, a 2D array of size rows x columns, where heights[row][col] represents the heigh 阅读全文
摘要：
Given strings s1 and s2, return the minimum contiguous substring part of s1, so that s2 is a subsequence of the part. If there is no such window in s1 阅读全文
摘要：
Given a rows x cols screen and a sentence represented as a list of strings, return the number of times the given sentence can be fitted on the screen. 阅读全文