| The 2023 ICPC Asia Hong Kong Regional Programming Contest (The 1st Universal Cup, Stage 2:Hong Kong) |
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Putata and Budada are playing an interesting game. They play this game with a die having $$$n$$$ faces. Every integer between $$$0$$$ and $$$n-1$$$ are written on exactly one face, and when they roll this die, each side will face up with equal probability. In other words, rolling the die will result in a uniform random integer between $$$0$$$ and $$$n-1$$$ with equal probability.
The game has two rounds. In the first round, the following happens:
In the second round, Budada can choose to do one of the following things:
Putata and Budada want to maximize the score of the game, and they are so clever that they will always make the best choice. Please write a program to calculate, for some given $$$n$$$, the expectation of the score of the game.
It can be shown that the answer can be expressed as an irreducible fraction $$$\frac{x}{y}$$$, where $$$x$$$ and $$$y$$$ are integers and $$$y \not \equiv 0 \pmod {998\,244\,353}$$$. Output the integer equal to $$$x\cdot y^{-1}\pmod {998\,244\,353}$$$. In other words, output such an integer $$$a$$$ that $$$0\leq a \lt 998\,244\,353$$$ and $$$a\cdot y\equiv x\pmod {998\,244\,353}$$$.
The input contains several test cases. The first line contains an integer $$$t$$$ ($$$1 \leq t\leq 10^4$$$).
For the following $$$t$$$ lines, each line contains an integer $$$n$$$ ($$$1\leq n\leq 998\,244\,352$$$), denoting one question.
Output $$$t$$$ lines, each line denotes the answer for one test case.
4 1 2 3 4
0 249561089 776412276 2
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