> #include<stdio.h>
> #include<string.h>
> char a[100005],b[100005],z[100005][10005];
> 
> int main()
> {
> 	int la,lb,i,j;
> 	while(scanf("%s%s",a+1,b+1))
> 	{
> 		la=strlen(a+1);
> 		lb=strlen(b+1);
> 		memset(z,0,sizeof(z));
> 		for(i=1;i<=la;i++)
> 			for(j=1;j<=lb;j++)
> 			{
> 				if(a[i]==b[j])
> 					z[i][j]=z[i-1][j-1]+1;
> 				else
> 				{
> 					if(z[i][j-1]>z[i-1][j])
> 						z[i][j]=z[i][j-1];
> 					else
> 						z[i][j]=z[i-1][j];
> 				}
> 			}
> 			if(z[la][lb]==la)
> 				printf("Yes\n");
> 			else
> 				printf("No\n");
> 	}
> 	return 0;
> }
 total size of array must not exceed 0x7fffffff bytes