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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：
输入一个字符串Str，输出Str里最长回文子串的长度。 回文串：指aba、abba、cccbccc、aaaa这种左右对称的字符串。 串的子串：一个串的子串指此（字符）串中连续的一部分字符构成的子（字符）串例如 abc 这个串的子串：空串、a、b、c、ab、ac、bc、abc 收起 输入一个字符串St 阅读全文