The careers weren't stupid and could climb that fucking tree.

Therefore, Cato climbs the tree and pushes Katniss off. Then Marvel stabs her in the stomach.
Peeta feels furious after they killed the love of his life and attacks Marvel. However, Glimmer shots him in the back of the head killing him instantly.
Marvel didn't got killed by Peeta but only got stabbed in the arm.

Next day, they see Rue on the tree but when Glimmer was about to shoot her, Rue made the tracker jacker hive fall.

However, only the girl from 4 dies in the attack. The same day, the careers find unconscious Rue and kill her.

The days pass and the careers kill many tributes.
On the feast, Thresh tries to kill Clove but Marvel saves her.

Next day, Foxface commits suicide by eating nightlock.

Then the careers are left on the arena.
They start a very bloody fight.
Cato kills Marvel, Glimmer kills Clove.

Cato and Glimmer begin to fight however they are both too weak from their injuries.
Soon, Cato gets stabbed in the stomach and Glimmer gets stabbed in the back.

They give up fighting and start lying next to eachother, they started waiting for one of them to bleed out to death.
"You were a good opponent." That's what Glimmer says to Cato.
"You too." He answers.

Cato bleed out first and his canon sounded.

Glimmer was taken to the Capitol hospital and gets cured. She becomes the victor of 74th Hunger Games.
However she knows that she won by luck.