摘要: Given N numbers, X1, X2, ... , XN, let us calculate the difference of every pair of numbers: ∣Xi - Xj∣ (1 ≤ i < j ≤ N). We can get C(N,2) differences 阅读全文
posted @ 2017-04-25 22:49 天之道,利而不害 阅读(198) 评论(0) 推荐(0) 编辑