Well how devastating was this nuclear war? For various reasons the number of nuclear bombs that would get detonated could vary severely from a few hundred to tens of thousands depending on how much of the worlds nuclear stockpile and the readiness of the nations in said nuclear conflict. If one nation managed to get the drop on the others their nuclear response may only be a hundred or less nukes overall.
Also it's not like the damage would be equally spread out and assuming that the war doesn't destroy the ecosystem it stands to reason that some parts of the world would remain unscathed. It can't just become a barren Wasteland since no one would launch a nuke at farmlands or forests, you aim at things like cities, factories, docks, and concentrations of military forces.
The only way for it to become a wasteland is that so many nukes are launched that the resulting damage from pollution and radiation to the world kills all plant life and nothing would last longer than 5 seconds in that world so the answer would be die.
So it in order for me to answer I would need to know where I am and how devastated the area around me is from the war.
In the scenario where the ecosystem is destroyed I fucked so what does it matter? Probably jerk off about 5 times then shoot myself in the head on the fifth load.
