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HDU2577 How to Type 2016-09-11 14:05 29人阅读 评论(0) 收藏

How to Type Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 6211    Accepted Submission(s): 2804 Problem Description Pirates have finished developing the typing software. He called Cathy to tes…

HDU2577 How to Type【DP】

题目链接: pid=2577">http://acm.hdu.edu.cn/showproblem.php? pid=2577 题目大意: 给你一个仅仅包括大写和小写字母的字符串,如今Pirates要从键盘上输出它.按CapsLk可开 启关闭大写和小写指示灯. 按Shift可转换将输入字母的大写和小写而不改变CapsLk的开关状态.Pirates有 一个坏习惯,假设输入的时候CapsLk是开着的,那么输入结束后必须把它关闭. 问,输入一个字符 串,最小的按键数目是多少 思路: 用两个数组d…

HDU2577 How to Type

题目链接 一道DP问题 定义dp[i][j]为敲完第i个字母的最小花费,j=1代表Caps Lock打开,j=0代表Caps Lock关闭,则有: 如果第i个字母为大写: dp[i][1]=min(dp[i-1][0]+2,dp[i-1][1]+1); dp[i][0]=min(dp[i-1][0]+2,dp[i-1][1]+2); 如果第i个字母为小写: dp[i][1]=min(dp[i-1][0]+2,dp[i-1][1]+2); dp[i][0]=min(dp[i-1][0]+1,dp[…

[HDU2577]How to Type（DP）

题目链接 题意 给一个大小写字符串,求最少敲击字符串次数,最开始和最后要求shift都是down的.如日常,大小写转换可以ctrl+z或者shift保持 up/down. 题解 两个dp数组,一个表示当前shift状态是up的最小转换次数,一个表示当前shift状态是down的最小转换次数.最后做处理和比较,再加上字符数即可. 代码 import java.util.Scanner; public class Main { public static void main(String args[…

HDU2577：How to Type(DP)

Problem Description Pirates have finished developing the typing software. He called Cathy to test his typing software. She is good at thinking. After testing for several days, she finds that if she types a string by some ways, she will type the key a…

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