poj1936 All in All

 1 #include<stdio.h>
 2 char str[100001],sub[100001];
 3 int main()
 4 {
 5     int i,k;
 6     while(~scanf("%s%s",sub,str))
 7     {
 8         for(k=i=0;str[i];i++)
 9             if(str[i]==sub[k]&&sub[k])
10                 k++;
11         if(sub[k]) printf("No\n");
12         else printf("Yes\n");
13     }
14     return 0;
15 }