摘要：为了准备一个独特的颁奖典礼，组织者在会场的一片矩形区域（可看做是平面直角坐标系的第一象限）铺上一些矩形地毯。一共有 n 张地毯，编号从 1 到 n。现在将这些地毯按照编号从小到大的顺序平行于坐标轴先后铺设，后铺的地毯覆盖在前面已经铺好的地毯之上。 地毯铺设完成后，组织者想知道覆盖地面某个点的最上面的 阅读全文

摘要：Input The first line contains two integers n and m (1 ≤ n ≤ 35, 1 ≤ m ≤ 109). The second line contains n integers a1, a2, ..., an (1 ≤ ai ≤ 109). Outp 阅读全文

摘要：Input Input is given from Standard Input in the following format: N A1 A2 … An Output Print the number of the pairs of integers l and r(1 <= l <= r <= 阅读全文

摘要：Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the other o 阅读全文

摘要：A sequence of N positive integers (10 < N < 100 000), each of them less than or equal 10000, and a positive integer S (S < 100 000 000) are given. Wri 阅读全文