linj73的博客

题目： Given a non-negative integer array representing the heights of a list of adjacent bars. Suppose each bar has a width of 1. Find the largest amount of water that can be trapped in the histogram. As...

题目： Given an array of n positive integers and a positive integer s, find the minimal length of a contiguous subarray of which the sum ≥ s. If there isn’t one, return 0 instead. For example, given the ...

题目： Given an array nums and a target value k, find the maximum length of a subarray that sums to k. If there isn’t one, return 0 instead. Note: The sum of the entire nums array is guaranteed to fit wi...

题目 Given a 2d grid map of 1s (land) and 0s (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume ...