摘要：Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest l 阅读全文

摘要：690. Employee Importance Easy 377369FavoriteShare 690. Employee Importance Easy 377369FavoriteShare Easy You are given a data structure of employee in 阅读全文

摘要：Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacen 阅读全文