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[LeetCode] 187. Repeated DNA Sequences 解题思路

All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the DNA. Write a function to find all the 10-letter-long seq…

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All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the DNA. Write a function to find all the 10-letter-long seq…

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[leetcode]187. Repeated DNA Sequences寻找DNA中重复出现的子串

很重要的一道题 题型适合在面试的时候考 位操作和哈希表结合 public List<String> findRepeatedDnaSequences(String s) { /* 寻找出现过一次以上的十个字母长的子串 最简单的想法是把每个长度为10的子串存到hashtable中,但是这肯定不符合出题人的意思,要考察位操作 看了答案,使用位操作,第一次做bit manipulation的题 由于A\C\G\T的ASCII码,后三位各不相同,所以我们只要考虑字符的后三位就行 用一个int类型来代表…

【LeetCode】187. Repeated DNA Sequences

题目: All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the DNA. Write a function to find all the 10-letter-long…

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All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the DNA. Write a function to find all the 10-letter-long seq…