题目描述
Problem Statement
There is an integer X written on a blackboard. You can do the operation below any number of times (possibly zero).
- Choose an integer x written on the blackboard.
- Erase one x from the blackboard and write two new integers $\lfloor \frac{x}{2}\rfloor$ and $\lceil \frac{x}{2}\rceil$.
Find the maximum possible product of the integers on the blackboard after your operations, modulo 998244353.
What are $\lfloor \frac{x}{2}\rfloor$ and $\lceil \frac{x}{2}\rceil$? For $a real number x, \lfloor x\rfloor$ denotes the largest integer not greater than x, and $\lceil x\rceil$ denotes the smallest integer not less than x. For example, the following holds.
- For x = 2, we have $\lfloor \frac{x}{2}\rfloor = 1$ and $\lceil \frac{x}{2}\rceil = 1$.
- For x = 3, we have $\lfloor \frac{x}{2}\rfloor = 1, \lceil \frac{x}{2}\rceil = 2$.
Input
Input is given from Standard Input from the following format:
X
Output
Print the maximum possible product of the integers on the blackboard after your operations, modulo 998244353.
Constraints
- $1\leq X \leq 10^{18}$
Sample Input 1
15
Sample Output 1
192
Here is a sequence of operations that makes the product of the integers on the blackboard 192.
- The initial state of the blackboard is (15).
- An operation with x = 15 changes it to (7, 8).
- An operation with x = 7 changes it to (8, 3, 4).
- An operation with x = 4 changes it to (8, 3, 2, 2).
- An operation with x = 8 changes it to (3, 2, 2, 4, 4).
Here, the product of the integers on the blackboard is $3\times 2\times 2\times 4\times 4 = 192$.
Sample Input 2
3
Sample Output 2
3
Doing zero operations makes the product of the integers on the blackboard 3.
Sample Input 3
100
Sample Output 3
824552442
The maximum possible product of the integers on the blackboard after your operations is 5856458868470016, which should be printed modulo 998244353.
输入格式
见题面 Input 部分
输出格式
见题面 Output 部分