What is the problem and the solution for The Three Little Pigs?

The problem is that the big bad wolf has blown down one little pigs house made of straw so the little pig goes to the other pigs house which is made of sticks and hides. Then the big bad wolf comes to the house made of sticks and blows it down.

The solution is the two pigs that made their houses out of straw and sticks run to the pig that made his house out of bricks therefor the big bad wolf can not blow the house down.