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A11508 | Sum the Fibonacci

时间限制1s
内存限制256MB
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题目描述

You are given an array $s$ of $n$ non-negative integers.

A 5-tuple of integers $(a,b,c,d,e)$ is said to be valid if it satisfies the following conditions:

- $1<=a,b,c,d,e<=n$
- $(s_{a}$ | $s_{b})$ & $s_{c}$ & $(s_{d}$ ^ $s_{e})=2^{i}$ for some integer $i$
- $s_{a}$ & $s_{b}=0$

Here, '|' is the bitwise OR, '&' is the bitwise AND and '^' is the bitwise XOR operation.

Find the sum of $f(s_{a}$ | $s_{b})*f(s_{c})*f(s_{d}$ ^ $s_{e})$ over all valid 5-tuples $(a,b,c,d,e)$ , where $f(i)$ is the $i$ -th Fibonnaci number ( $f(0)=0,f(1)=1,f(i)=f(i-1)+f(i-2)$ ).

Since answer can be is huge output it modulo $10^{9}+7$ .

输入格式

The first line of input contains an integer $n$ ( $1<=n<=10^{6}$ ).

The second line of input contains $n$ integers $s_{i}$ ( $0<=s_{i}<2^{17}$ ).

输出格式

Output the sum as described above, modulo $10^{9}+7$

输入输出样例

输入 #1
2
1 2
输出 #1
32
输入 #2
3
7 4 1
输出 #2
3520
输入 #3
10
1 3 0 7 3 7 6 5 7 5
输出 #3
1235424
输入 #4
10
50 9 11 44 39 40 5 39 23 7
输出 #4
113860062
C++ 编辑器
输入
输出