309765: CF1732C1. Sheikh (Easy version)
Memory Limit:256 MB
Time Limit:4 S
Judge Style:Text Compare
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Description
Sheikh (Easy version)
题目描述
This is the easy version of the problem. The only difference is that in this version $ q = 1 $ . You are given an array of integers $ a_1, a_2, \ldots, a_n $ . The cost of a subsegment of the array $ [l, r] $ , $ 1 \leq l \leq r \leq n $ , is the value $ f(l, r) = \operatorname{sum}(l, r) - \operatorname{xor}(l, r) $ , where $ \operatorname{sum}(l, r) = a_l + a_{l+1} + \ldots + a_r $ , and $ \operatorname{xor}(l, r) = a_l \oplus a_{l+1} \oplus \ldots \oplus a_r $ ( $ \oplus $ stands for [bitwise XOR](https://en.wikipedia.org/wiki/Bitwise_operation#XOR)). You will have $ q = 1 $ query. Each query is given by a pair of numbers $ L_i $ , $ R_i $ , where $ 1 \leq L_i \leq R_i \leq n $ . You need to find the subsegment $ [l, r] $ , $ L_i \leq l \leq r \leq R_i $ , with maximum value $ f(l, r) $ . If there are several answers, then among them you need to find a subsegment with the minimum length, that is, the minimum value of $ r - l + 1 $ .输入输出格式
输入格式
Each test consists of multiple test cases. The first line contains an integer $ t $ ( $ 1 \leq t \leq 10^4 $ ) — the number of test cases. The description of test cases follows. The first line of each test case contains two integers $ n $ and $ q $ ( $ 1 \leq n \leq 10^5 $ , $ q = 1 $ ) — the length of the array and the number of queries. The second line of each test case contains $ n $ integers $ a_1, a_2, \ldots, a_n $ ( $ 0 \leq a_i \leq 10^9 $ ) — array elements. $ i $ -th of the next $ q $ lines of each test case contains two integers $ L_i $ and $ R_i $ ( $ 1 \leq L_i \leq R_i \leq n $ ) — the boundaries in which we need to find the segment. It is guaranteed that the sum of $ n $ over all test cases does not exceed $ 2 \cdot 10^5 $ . It is guaranteed that $ L_1 = 1 $ and $ R_1 = n $ .
输出格式
For each test case print $ q $ pairs of numbers $ L_i \leq l \leq r \leq R_i $ such that the value $ f(l, r) $ is maximum and among such the length $ r - l + 1 $ is minimum. If there are several correct answers, print any of them.
输入输出样例
输入样例 #1
6
1 1
0
1 1
2 1
5 10
1 2
3 1
0 2 4
1 3
4 1
0 12 8 3
1 4
5 1
21 32 32 32 10
1 5
7 1
0 1 0 1 0 1 0
1 7
输出样例 #1
1 1
1 1
1 1
2 3
2 3
2 4