308664: CF1554A. Cherry
Memory Limit:256 MB
Time Limit:1 S
Judge Style:Text Compare
Creator:
Submit:0
Solved:0
Description
Cherry
题意翻译
给定长度为 $n$ 的序列 $a_1, a_2, \dots, a_n$,求: $$ \max_{1 \le l < r \le n}\left(\max_{i=l}^r a_i \times \min_{i=l}^r a_i\right) $$ 数据范围 $n \le 10^5$。题目描述
You are given $ n $ integers $ a_1, a_2, \ldots, a_n $ . Find the maximum value of $ max(a_l, a_{l + 1}, \ldots, a_r) \cdot min(a_l, a_{l + 1}, \ldots, a_r) $ over all pairs $ (l, r) $ of integers for which $ 1 \le l < r \le n $ .输入输出格式
输入格式
The first line contains a single integer $ t $ ( $ 1 \le t \le 10\,000 $ ) — the number of test cases. The first line of each test case contains a single integer $ n $ ( $ 2 \le n \le 10^5 $ ). The second line of each test case contains $ n $ integers $ a_1, a_2, \ldots, a_n $ ( $ 1 \le a_i \le 10^6 $ ). It is guaranteed that the sum of $ n $ over all test cases doesn't exceed $ 3 \cdot 10^5 $ .
输出格式
For each test case, print a single integer — the maximum possible value of the product from the statement.
输入输出样例
输入样例 #1
4
3
2 4 3
4
3 2 3 1
2
69 69
6
719313 273225 402638 473783 804745 323328
输出样例 #1
12
6
4761
381274500335