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B君和G君聊天的时候想到了如下的问题。 给定自然数l和r ,选取2个整数x,y满足l 其中|表示按位或，即C、 C++、 Java中的|运算。Input包含至多10001组测试数据。 第一行有一个正整数，表示数据的组数。 接下来每一行表示一组数据，包含两个整数l,r。 保证 0 10181018。Output对于每组数据输出一行，表示最大的位或。Sample I

Football GamesA mysterious country will hold a football world championships---Abnormal Cup, attracting football teams and fans from all around the world. This country is so mysterious that none

Friends and Enemies On an isolated island, lived some dwarves. A king (not a dwarf) ruled the island and the seas nearby, there are abundant cobblestones of varying colors on

BaoBao is trapped in a one-dimensional maze consisting of \(n\) grids arranged in a row! The grids are numbered from 1 to \(n\) from left to right, and the \(i\)-th grid is marked with a character \(s

Nike likes playing cards and makes a problem of it. Now give you n integers, ai(1≤i≤n)ai(1≤i≤n) We define two identical numbers (eg: 2,22,2) a Duizi, and three consecutive positive integer

A supermarket has a set Prod of products on sale. It earns a profit px for each product x∈Prod sold by a deadline dx that is measured as an integral number of time units starting from the moment the s

FJ is about to take his N (1 ≤ N ≤ 2,000) cows to the annual"Farmer of the Year" competition. In this contest every farmer arranges his cows in a line and herds them past the judges.The contest orga

Saruman the White must lead his army along a straight path from Isengard to Helm’s Deep. To keep track of his forces, Saruman distributes seeing stones, known as palantirs, among the troops. Each pala

Farmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needs N (1 ≤ N ≤ 20,000) planks of wood, each having some integer length Li (1 ≤ Li