AtCoder Regular Contest 143
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Problem Statement
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There are $N$ piles of pebbles. Initially, the $i$-th pile has $A_i$ pebbles.
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Takahashi and Aoki will play a game using these piles. They will alternately perform the following operation, with Takahashi going first, and the one who becomes unable to do so loses the game.
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- Choose one or more piles, and remove the following number of pebbles from each chosen pile:
$X$pebbles if this operation is performed by Takahashi, and$Y$pebbles if performed by Aoki. Here, a pile with an insufficient number of pebbles cannot be chosen.
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Determine the winner of the game if both players play optimally.
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Constraints
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$1 \leq N \leq 2\times 10^5$$1 \leq X, Y \leq 10^9$$1 \leq A_i \leq 10^9$
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Input
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Input is given from Standard Input in the following format:
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N X Y
A_1 A_2 \cdots A_N
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Output
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If it is Takahashi who will win the game, print First; if it is Aoki, print Second.
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样例
Input #1
2 1 1
3 3
Output #1
First
Here is one possible progression of the game.
- Takahashi removes $1$ pebble from both piles.
- Aoki removes $1$ pebble from the $1$-st pile.
- Takahashi removes $1$ pebble from the $1$-st pile.
- Aoki removes $1$ pebble from the $2$-nd pile.
- Takahashi removes $1$ pebble from the $2$-nd pile.
No matter how Aoki plays, Takahashi can always win, so the answer is `First`.
Input #2
2 1 2
3 3
Output #2
Second
题目信息
题面与样例版权归 AtCoder 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。