When i play more than hour i feel strange pain in my fingers. Could you recommend me some good strings for exercises?

you had posted before, that you play only for 2 months - pain in fingers is normal when you play for such a short time. if you are looking for a little bit less hard strings you can buy nickel ones. but i don't know if it helps you, because you didn't write which hand's fingers hurt you. if it's left hand, maybe you can think about lowering the strings. but the only way to forget about any pain is to play much and create a "shell" on your fingers practise, practise, practise!

yea i would have to agree with that guy.....the only way to stop that feeling from happening is to play so much that it just hurt anymore

Another good way to solve the problem is to get a solution of epsom salts and water (about a teaspoon to 1 cup of water) and soak those sore fingers. When they dry, it draws out the moisture in the skin and aids callus building.

The pain will go away after enough time and practice. You just have to build those callouses on your fret-hand fingertips, if that's type of pain you are referring to. If you mean pain in your tendons, joints or wrist, you might want to alter your technique, because playing in a way that isn't comfortable can be bad in the long run. Also, typically (but not always), playing a steel-stringed acoustic guitar is more likely to cause some finger/fingertip pain because of the thicker gauge of strings as well as the higher string tension. An electric guitar is typically equipped with a lighter gauge of strings made of a nickel alloy which is far more flexible and forgiving. Also, a nylon string classical guitar should be easier on the fingertips. But either way, string gauge, brand, and tension are all a matter of preference once you develop your playing style and sound. I was just giving you some things to consider. Good Luck.