UVa 10340 - All in All

链接：

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=113&page=show_problem&problem=1281

原题：

You 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 stringssandt, you have to decide whethersis a subsequence oft, i.e. if you can remove characters fromtsuch that the concatenation of the remaining characters iss.

Input Specification

The input contains several testcases. Each is specified by two stringss, tof alphanumeric ASCII characters separated by whitespace. Input is terminated by EOF.

Output Specification

For each test case output, ifsis a subsequence oft.

Sample Input

sequence subsequence

person compression

VERDI vivaVittorioEmanueleReDiItalia

caseDoesMatter CaseDoesMatter

Sample Output

Yes

No

Yes

No

分析与总结：

简单题，直接判断一个字符串是否是另一个字符串的子串。

代码：

/*
 *  UVa: 10340 - All in All
 *  Time: 0.008s
 *  Author: D_Double
 */
#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
char str1[1000000], str2[1000000];

bool judge(){
    int pos=0, i;
    for(i=0; i<strlen(str1); ++i){
        bool flag=false;
        while(pos < strlen(str2)){
            if(str2[pos]==str1[i])
                break;
            ++pos;
        }
        if(pos==strlen(str2)) return false;
        ++pos;
    }
    if(i==strlen(str1)) return true;
    return false;
}

int main(){
    while(scanf("%s %s",str1,str2)!=EOF){
        if(judge()) printf("Yes\n");
        else printf("No\n");
    }
    return 0;
}

—— 生命的意义，在于赋予它意义。
    
  原创http://blog.csdn.net/shuangde800，By  D_Double (转载请标明)