POJ 1936:全在其中(All in All )
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All in All
Time Limit : 2000/1000ms (Java/Other) Memory Limit : 60000/30000K (Java/Other)
Total Submission(s) : 14 Accepted Submission(s) : 2
Problem DescriptionYou have devised a new encryption technique which encodes a message by inserting between its characters randomly generated strings in a clever way. Because of pending patent issues we will not discuss in detail how the strings are generated and inserted into the original message. To validate your method, however, it is necessary to write a program that checks if the message is really encoded in the final string.
Given two strings s and t, you have to decide whether s is a subsequence of t, i.e. if you can remove characters from t such that the concatenation of the remaining characters is s.
InputThe input contains several testcases. Each is specified by two strings s, t of alphanumeric ASCII characters separated by whitespace.The length of s and t will no more than 100000.
OutputFor each test case output "Yes", if s is a subsequence of t,otherwise output "No".
Sample Inputsequence subsequenceperson compressionVERDI vivaVittorioEmanueleReDiItaliacaseDoesMatter CaseDoesMatter
Sample OutputYesNoYesNo
Given two strings s and t, you have to decide whether s is a subsequence of t, i.e. if you can remove characters from t such that the concatenation of the remaining characters is s.
sequence subsequenceperson compressionVERDI vivaVittorioEmanueleReDiItaliacaseDoesMatter CaseDoesMatter
YesNoYesNo
中文版:
你设计了一个新的加密技术,可以用一种聪明的方式在一个字符串的字符间插入随机的字符串从而对信息进行编码。由于专利问题,我们将不会详细讨论如何在原有信息中产生和插入字符串。不过,为了验证你的方法,有必要写一个程序来验证原来的信息是否全在最后的字符串之中。
给定两个字符串s和t,你需要判断s是否是t的“子列”。也就是说,如果你去掉t中的某些字符,剩下字符将连接而成为s。
Sample Input
sequence subsequenceperson compressionVERDI vivaVittorioEmanueleReDiItaliacaseDoesMatter CaseDoesMatter
Sample Output
YesNoYesNo
注:此题为:POJ 1936:全在其中
说明:在母串中一直循环,字串的循环,判断时,母串从前往后,不回头,保证顺序
已AC源代码:
#include<stdio.h>#include<string.h>#define M 100000int main(){char ch1[M+1],ch2[M+1];while(~scanf("%s %s",ch1,ch2)){int len1,len2,i,j,k;len1=strlen(ch1);len2=strlen(ch2);k=j=0;for(i=0;i<len1;++i){if(j==len2)break;for(;j<len2;j++) //j一直加,从而使顺序不变 {if(ch1[i]==ch2[j]){k++;j++;break;}}}if(k==len1)printf("Yes\n");elseprintf("No\n");}return 0;}
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