It wouldn't just be atomic weapons that would devastate the planet after a nuclear war. The loss of markets, foreign aid and economic trade and foreign money flow would collapse global economies beyond what was hit. That would not just be in terms of money itself, but also in terms of the collapse of the movement of food and other common goods. And the collapse of economies would decimate local production and movement of such things. Basically, anything taken for granted becomes a scarcity. Anything manufactured elsewhere is gone. And that matters because in economies, a lot comes from elsewhere because it can, and in a global market, nations focus on what they need to make and import whatever they don't need to make from elsewhere, keeping costs low and allowing local/national economies to focus on industries that are better economically. Anything produced locally will feel a great deal of strain. Not to mention fallout and problems in weather.
So basically, anywhere not hit by a nuclear warhead is going to be severely harmed nonetheless. Scarcity, starvation, collapse, decay, anarchy. Grow what you can in the fields and hope for the best.
Impossible to say but probably some Latin American and African nations might avoid direct nuclear hit. And perhaps some Pacific and Southern Asian nations are too quiet safe but this is pretty unsure. Surely North America and Europe would got most of nukes.
And Asia. Basically anywhere with an American, NATO, Warsaw Pact, Soviet, or Chinese military base or asset. And anywhere that the military forces of those factions fight.