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

摘要：题目描述 在一个果园里，多多已经将所有的果子打了下来，而且按果子的不同种类分成了不同的堆。多多决定把所有的果子合成一堆。 每一次合并，多多可以把两堆果子合并到一起，消耗的体力等于两堆果子的重量之和。可以看出，所有的果子经过 n-1n−1 次合并之后， 就只剩下一堆了。多多在合并果子时总共消耗的体力等 阅读全文