Chiaki would like to know the sum of the first n terms of the sequence, i.e.
[编程题]Chiaki Sequence Reloaded
- 时间限制：C/C++ 1秒，其他语言2秒 空间限制：C/C++ 128M，其他语言256M
- 算法知识视频讲解
Chiaki is interested in an infinite sequence a1, a2, a3, ..., which defined as follows:
%5E%7B%5Cfrac%7Bn(n%2B1)%7D%7B2%7D%7D%20%26%20n%20%5Cge%202%5Cend%7Bcases%7D)
Chiaki would like to know the sum of the first n terms of the sequence, i.e.
. As this number may be very large, Chiaki is only interested in its remainder modulo (109 + 7).
Chiaki would like to know the sum of the first n terms of the sequence, i.e.
输入描述:
There are multiple test cases. The first line of input contains an integer T (1 ≤ T ≤ 105), indicating the number of test cases. For each test case:
The first line contains an integer n (1 ≤ n ≤ 1018).
输出描述:
For each test case, output an integer denoting the answer.
示例1
输入
10 1 2 3 4 5 6 7 8 9 10
输出
0 1 2 2 4 4 6 7 8 11
暂无题解
问题信息
难度：
0条回答
0收藏
11浏览
通过挑战的用户
查看代码-
2018-09-11 18:25:24 -
2018-09-06 19:22:30
-
2018-09-06 14:27:43
-
2018-09-01 21:24:33
-
2018-08-30 11:09:38
相关试题
-
扫描二维码，关注牛客网
- 意见反馈
-
下载牛客APP，随时随地刷题
扫一扫，把题目装进口袋
- 求职之前，先上牛客
-
扫描二维码，进入QQ群
扫描二维码，关注牛客公众号
- 公司地址：北京市朝阳区北苑路北美国际商务中心K1座一层-北京牛客科技有限公司
- 联系方式：010-60728802 投诉举报电话：010-57596212（朝阳人力社保局）
- 牛客科技© All rights reserved admin@nowcoder.com
- 京ICP备14055008号-4 增值电信业务经营许可证 营业执照 人力资源服务许可证
-
京公网安备
11010502036488号
