题意:给一个二进制数(包含3种符号:'0'  '1'  '?'  ,问号可随意 ),要求将其转成格雷码,给一个序列a,若转成的格雷码第i位为1,则得分+a[i].求填充问号使得得分最多. 思路:如果了解格雷码的转换,相信能很快看出一些端倪.偷别人的图: 分析一下:所给的二进制数要转成格雷码,只与所给二进制有关.即不需要利用已经某些转换好的格雷码字. 接下来分析5个位的串 : (1)00?00 仅有1个问号,只会与后面那些连续且非问号的串转成格雷码有关 (2)00??0 有连续的1个问号,这才需要…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5375 题面: Gray code Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 626    Accepted Submission(s): 369 Problem Description The reflected binary cod…

The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integer n representing the total number of bits in the code, print the sequence of gray code. A gray code sequence must begin with 0. Fo…

格雷码 the n-1 bit code, with 0 prepended to each word, followd by the n-1 bit code in reverse order, with 1 prepended to each word. public class GrayCode{ public static void gray(int n, String prefix) { ) System.out.println(prefix); else { gray(n-,pref…

Gray code Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 569    Accepted Submission(s): 337 Problem Description The reflected binary code, also known as Gray code after Frank Gray, is a binary…

Gray code Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 684    Accepted Submission(s): 402 Problem Description The reflected binary code, also known as Gray code after Frank Gray, is a binary…

The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integer n representing the total number of bits in the code, print the sequence of gray code. A gray code sequence must begin with 0. Ex…

The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integer n representing the total number of bits in the code, find the sequence of gray code. A gray code sequence must begin with 0 and…

基本概念 格雷码是一种准权码,具有一种反射特性和循环特性的单步自补码,它的循环.单步特性消除了随机取数时出现重大误差的可能,它的反射.自补特性使得求反非常方便.格雷码属于可靠性编码,是一种错误最小化的编码方式. 自然二进制码可以直接由数/模转换器转换成模拟信号,但是在某些情况下,例如从十进制的3转换到4的二进制时,每一位都要变.3的二进制位:,而4的二进制位:100,所以这就会使数字电路产生很大的尖峰电流脉冲.而格雷码则没有这一缺点,它是一种数字排序系统,其中的所有相邻整数在它们的数字表示中只有…

题目连接 : 传送门 题意: 给定一个长度为的二进制串和一个长度为n的序列a[],我们能够依据这个二进制串得到它的Gray code. Gray code中假设第i项为1的话那么我们就能够得到a[i]的值,在原来的二进制串中有一些位置为? 表示能够为0, 也能够为1求最后所能得到的最大的值. 已知二进制码怎样得到Gray code请看:传送门 分析: 我们能够通过动态规划来解决问题,状态转移也很好找 ,dp[i][j]表示到第i个位置.第i个位置 取j所能得到的最大值.非常明显这个题的j仅仅能有…