__似水流年__的博客

The Staircases Time Limit:2 Seconds Memory Limit:65536 KB One curious child has a set of N little bricks. From these bricks he builds different staircases. Staircase consists of steps of diff...

Alice and Bob are playing a game. This game is played with several identical pots and one marble. When the game starts, Alice puts the pots in one line and puts the marble in one of the pots. After th...