JZOJ2134.2017.05.20【usaco2017_Mar Bronze & Silver】C组T2Bovine Genomics

最新推荐文章于 2020-05-16 17:11:10 发布

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最新推荐文章于 2020-05-16 17:11:10 发布 · 800 阅读

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#模拟赛 #usaco

该博客介绍了USACO2017比赛中关于斑点牛基因组的问题，讨论如何通过牛的基因序列来确定斑点特征的位置。博主解释了问题背景，给出了输入输出格式，并分享了解题思路，包括使用集合来筛选只存在于斑点牛基因中的字符位置，从而计算可能解释斑点的基因位置数量。

题目描述

     Farmer John owns N cows with spots and N cows without spots. Having just completed a course in bovine genetics, he is convinced that the spots on his cows are caused by mutations at a single location in the bovine genome.
     At great expense, Farmer John sequences the genomes of his cows. Each genome is a string of length Mbuilt from the four characters A, C, G, and T. When he lines up the genomes of his cows, he gets a table like the following, shown here for N=3:

Positions: 1 2 3 4 5 6 7 … M

Spotty Cow 1: A A T C C C A … T
Spotty Cow 2: G A T T G C A … A
Spotty Cow 3: G G T C G C A … A

Plain Cow 1: A C T C C C A … G
Plain Cow 2: A C T C G C A … T
Plain Cow 3: A C T T C C A … T

     Looking carefully at this table, he surmises that position 2 is a potential location in the genome that could explain spottiness. That is, by looking at the character in just this position, Farmer John can