James Pan

https://leetcode.com/problems/number-of-islands/ 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

原题网址：https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/ Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to

原题网址：https://leetcode.com/problems/paint-house/ There are a row of n houses, each house can be painted with one of the three colors: red, blue or green. The cost of painting each house with a cer

原题网址：https://leetcode.com/problems/paint-house-ii/ There are a row of n houses, each house can be painted with one of the k colors. The cost of painting each house with a certain color is differe

原题网址：https://leetcode.com/problems/paint-fence/ There is a fence with n posts, each post can be painted with one of the k colors. You have to paint all the posts such that no more than two adj