摘要：
Monocarp and Bicarp live in Berland, where every bus ticket consists of nn digits (nn is an even number). During the evening walk Monocarp and Bicarp 阅读全文
摘要：
There is a white sheet of paper lying on a rectangle table. The sheet is a rectangle with its sides parallel to the sides of the table. If you will ta 阅读全文
摘要：
There is a white sheet of paper lying on a rectangle table. The sheet is a rectangle with its sides parallel to the sides of the table. If you will ta 阅读全文
摘要：
Suppose there is a h×wh×w grid consisting of empty or full cells. Let's make some definitions: riri is the number of consecutive full cells connected 阅读全文