SANS

摘要： 求 n 个矩形中奇数个矩形覆盖区域的面积和。 n 个矩形中奇数个矩形覆盖区域的面积和。 You are given several axis-aligned rectangles. Compute the sum of the area of the regions that are covered 阅读全文

摘要： Problem L — limit 1 second Liars There are n people in a circle, numbered from 1 to n, each of whom always tells the truth or always lies. Each person 阅读全文