CF639A Bear and Displayed Friends

Limak is a little polar bear. He loves connecting with other bears via social networks. He has $ n $ friends and his relation with the $ i $ -th of them is described by a unique integer $ t_{i} $ . The bigger this value is, the better the friendship is. No two friends have the same value $ t_{i} $ . Spring is starting and the Winter sleep is over for bears. Limak has just woken up and logged in. All his friends still sleep and thus none of them is online. Some (maybe all) of them will appear online in the next hours, one at a time. The system displays friends who are online. On the screen there is space to display at most $ k $ friends. If there are more than $ k $ friends online then the system displays only $ k $ best of them — those with biggest $ t_{i} $ . Your task is to handle queries of two types: - "1 id" — Friend $ id $ becomes online. It's guaranteed that he wasn't online before. - "2 id" — Check whether friend $ id $ is displayed by the system. Print "YES" or "NO" in a separate line. Are you able to help Limak and answer all queries of the second type?

The first line contains three integers $ n $ , $ k $ and $ q $ ( $ 1

For each query of the second type print one line with the answer — "YES" (without quotes) if the given friend is displayed and "NO" (without quotes) otherwise.

In the first sample, Limak has $ 4 $ friends who all sleep initially. At first, the system displays nobody because nobody is online. There are the following $ 8 $ queries: 1. "1 3" — Friend $ 3 $ becomes online. 2. "2 4" — We should check if friend $ 4 $ is displayed. He isn't even online and thus we print "NO". 3. "2 3" — We should check if friend $ 3 $ is displayed. Right now he is the only friend online and the system displays him. We should print "YES". 4. "1 1" — Friend $ 1 $ becomes online. The system now displays both friend $ 1 $ and friend $ 3 $ . 5. "1 2" — Friend $ 2 $ becomes online. There are $ 3 $ friends online now but we were given $ k=2 $ so only two friends can be displayed. Limak has worse relation with friend $ 1 $ than with other two online friends ( $ t_{1}<t_{2},t_{3} $ ) so friend $ 1 $ won't be displayed 6. "2 1" — Print "NO". 7. "2 2" — Print "YES". 8. "2 3" — Print "YES".