Codeforces Round 752 (Div. 1)
F
October 18, 2017
Codeforces
2700
原题
← E→
翻译中…

It was October 18, 2017. Shohag, a melancholic soul, made a strong determination that he will pursue Competitive Programming seriously, by heart, because he found it fascinating. Fast forward to 4 years, he is happy that he took this road. He is now creating a contest on Codeforces. He found an astounding problem but has no idea how to solve this. Help him to solve the final problem of the round.

翻译中…

You are given three integers $n$, $k$ and $x$. Find the number, modulo $998\,244\,353$, of integer sequences $a_1, a_2, \ldots, a_n$ such that the following conditions are satisfied:

翻译中…
  • $0 \le a_i \lt 2^k$ for each integer $i$ from $1$ to $n$.
  • There is no non-empty subsequence in $a$ such that the bitwise XOR of the elements of the subsequence is $x$.
翻译中…

A sequence $b$ is a subsequence of a sequence $c$ if $b$ can be obtained from $c$ by deletion of several (possibly, zero or all) elements.

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Input

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The first line contains a single integer $t$ ($1 \le t \le 10^5$)  — the number of test cases.

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The first and only line of each test case contains three space-separated integers $n$, $k$, and $x$ ($1 \le n \le 10^9$, $0 \le k \le 10^7$, $0 \le x \lt 2^{\operatorname{min}(20, k)}$).

翻译中…

It is guaranteed that the sum of $k$ over all test cases does not exceed $5 \cdot 10^7$.

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Output

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For each test case, print a single integer — the answer to the problem.

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Note

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In the first test case, the valid sequences are $[1, 2]$, $[1, 3]$, $[2, 1]$, $[2, 3]$, $[3, 1]$ and $[3, 2]$.

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In the second test case, the only valid sequence is $[0, 0]$.

翻译中…

样例

Input #1
6
2 2 0
2 1 1
3 2 3
69 69 69
2017 10 18
5 7 0
Output #1
6
1
15
699496932
892852568
713939942
InputCopy OutputCopy
题目信息
题号
1603F
时间限制
4 s
内存限制
512 MB
标签
组合数学
动态规划
模拟
数学

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。