F. Lisa and the Martians 问题求y =（a[i] ^ x）& (a[j] ^ x)最大，可知x可自由选择，那么我们就考虑y怎么取最大值 1.根据&,可知a[i]a[j]1时，二进制该位置为1，若x可使得俩位置为1，那么就转换成最多的a[i]==a[j]的位置，也就是a[i]^ ......
## 题目描述 Lisa was kidnapped by martians! It okay, because she has watched a lot of TV shows about aliens, so she knows what awaits her. Let's call inte ......