摘要：
There is a rectangular grid of n rows of m initially white cells each. Arkady performed a certain number (possibly zero) of operations on it. In the i 阅读全文
摘要：
Overlooking the captivating blend of myriads of vernal hues, Arkady the painter lays out a long, long canvas. Arkady has a sufficiently large amount o 阅读全文