摘要：
There are N kangaroos going out to eat at an Indian restaurant. The ith kangaroo wants to eat exactly xi food. The kangaroos all want ... 阅读全文
摘要：
Physics cat likes to draw shapes and figure out their area. He starts by drawing a circle. Then inside the circle, he draws the triang... 阅读全文
摘要：
in a magical forest, there exists N bamboos that don't quite get cut down the way you would expect.Originally, the height of the ith b... 阅读全文