子序列

 1 #include<iostream>
 2 using namespace std;
 3 int main()
 4 {
 5     int p1, p2;
 6     char str1[1000000], str2[1000000];
 7     while (cin >> str2)
 8     {
 9         cin >> str1;
10         p2 = 0;
11         for (p1 = 0; str1[p1] != 0; p1++)
12         {
13             if (str2[p2] == str1[p1])
14             {
15                 p2++;
16             }
17             if (str2[p2] == 0)
18             {
19                 cout << "Yes\n";
20                 break;
21             }
22         }
23         if (str1[p1] == 0)
24             cout << "No\n";
25     }
26     return 0;
27 }