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c++算法之深搜 浅谈回溯与不回溯 先说理论上的（个人意见）：需要回溯的题大多都是迷宫这一类的，对这一步所做的操作不确定，可操作可不操作的（就像迷宫，这一步到底走不走并不确定），要将操作在递归之后回溯一步；如果操作对象变量在深搜函数的参里，也可以在递归里写参的时候写在参里（举个例子吧，像dfs(c+ 阅读全文
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Description A single-player game is played on a rectangular board divided in R rows and C columns. There is a single uppercase letter (A-Z) written in 阅读全文
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Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be fille 阅读全文
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Description Due to recent rains, water has pooled in various places in Farmer John's field, which is represented by a rectangle of N x M (1 <= N <= 10 阅读全文