poj1936 All in All

#include<stdio.h>
char str[100001],sub[100001];
int main()
{
    int i,k;
    while(~scanf("%s%s",sub,str))
    {
        for(k=i=0;str[i];i++)
            if(str[i]==sub[k]&&sub[k])
                k++;
        if(sub[k]) printf("No\n");
        else printf("Yes\n");
    }
    return 0;
}