AtCoder Regular Contest 137
C
Distinct Numbers
AtCoder
⌀ 2043
原题
← BD →
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Problem Statement

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You are given a non-negative integer sequence of length $N$: $A=(A_1,A_2,\cdots,A_N)$. Here, all elements of $A$ are pairwise distinct.

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Alice and Bob will play a game. They will alternately play a turn, with Alice going first. In each turn, the player does the operation below.

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  • Choose the largest element in $A$ at the moment, and replace it with a smaller non-negative integer. Here, all elements in $A$ must still be pairwise distinct after this operation.
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The first player to be unable to do the operation loses. Determine the winner when both players play optimally.

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Constraints

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  • $2 \leq N \leq 3 \times 10^5$
  • $0 \leq A_1 < A_2 < \cdots < A_N \leq 10^9$
  • All values in input are integers.
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Input

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Input is given from Standard Input in the following format:

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N
A_1 A_2 \cdots A_N

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Output

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If Alice wins, print Alice; if Bob wins, print Bob.

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样例

Input #1
2
2 4
Output #1
Alice
In Alice's first turn, she may replace $4$ with $0$, $1$, or $3$. If she replaces $4$ with $0$ or $1$, Bob's move in the next turn will make Alice unable to do the operation and lose. On the other hand, if she replaces $4$ with $3$, she can win regardless of Bob's subsequent moves. Thus, Alice wins in this input.
Input #2
3
0 1 2
Output #2
Bob
题目信息
题号
arc137_c
时间限制
2 s
内存限制
1024 MB

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