摘要： Problem Description A murder happened in the hotel. As the best detective in the town, you should examine all the N rooms of the hotel immediately... 阅读全文

摘要： Problem Description This is a small but ancient game. You are supposed to write down the numbers 1, 2, 3, ... , 2n - 1, 2n consecutively in clockw... 阅读全文

摘要： Problem Description As we all know the Train Problem I, the boss of the Ignatius Train Station want to know if all the trains come in strict-incre... 阅读全文