LETS CONTINUE!!!!!!
After the purpose to be the symbol and accept it, the conditions are simples...Katnis kill Snow. And in the travel till the capitol, they have many obstacles like in the real hunger games. Every step that they give can be a tramp. Many companions die but at the final she can do the purpose.
In a short resume, they wins, Snow die but Coin only did that for the power that means that she die too with Katniss´s bow and arrow.
She stay in her district trying to rebuild all, with Peeta. In the book says that she wait for many years (almost 20) for have children but in the movie was in few years.
The outcome was that, a city without games, with peace and a new start.
THANK YOU