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[LeetCode] Minimum Genetic Mutation 最小基因变化

A gene string can be represented by an 8-character long string, with choices from "A", "C", "G", "T". Suppose we need to investigate about a mutation (mutation from "start" to "end"), where ONE m…

Leetcode: Minimum Genetic Mutation

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Leetcode 433.最小基因变化

最小基因变化 一条基因序列由一个带有8个字符的字符串表示,其中每个字符都属于 "A", "C", "G", "T"中的任意一个. 假设我们要调查一个基因序列的变化.一次基因变化意味着这个基因序列中的一个字符发生了变化. 例如,基因序列由"AACCGGTT" 变化至 "AACCGGTA" 即发生了一次基因变化. 与此同时,每一次基因变化的结果,都需要是一个合法的基因串,即该结果属于一个基因…

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433. 一条基因序列由一个带有8个字符的字符串表示,其中每个字符都属于 "A", "C", "G", "T"中的任意一个. 假设我们要调查一个基因序列的变化.一次基因变化意味着这个基因序列中的一个字符发生了变化. 例如,基因序列由"AACCGGTT" 变化至 "AACCGGTA" 即发生了一次基因变化. 与此同时,每一次基因变化的结果,都需要是一个合法的基因串,即该结果属于一个基因库.…

【LeetCode】433. Minimum Genetic Mutation 解题报告（Python & C++）

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 题目地址: https://leetcode.com/problems/minimum-genetic-mutation/description/ 题目描述 A gene string can be represented by an 8-character long string, with choices from "A", &q…

【leetcode】433. Minimum Genetic Mutation

题目如下: 解题思路:我的思路很简单,就是利用BFS方法搜索,找到最小值. 代码如下: class Solution(object): def canMutation(self, w, d, c, q): l = ["A",'C','G','T'] for i in range(len(w)): for j in l: if w[i] != j: v = w[:i] + j + w[i + 1:] if v in d and (d[v] == 0 or d[v] > c + 1)…

[LeetCode] Minimum Height Trees 最小高度树

For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible rooted trees, those with minimum height are called minimum height trees (MHTs). Given such a graph, write…

[LeetCode] Minimum Window Substring 最小窗口子串

Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). For example,S = "ADOBECODEBANC"T = "ABC" Minimum window is "BANC". Note:If there is no such window i…

[LeetCode] Minimum Path Sum 最小路径和

Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path. Note: You can only move either down or right at any point in time. 这道题跟之前那道Dungeon Game 地牢游戏 没有什么太大的…