EDU15 B. Powers of Two
B. Powers of Two题意:问,有多少对i,j(i<j). 使得a[i]+a[j]是2的幂次数思路: 枚举即可 nlognlogn .. 记住开LL吧.#include<bits/stdc++.h>#define PI acos(-1.0)#define pb push_back#define F first#define S second#define de...
