Hello 2024
A
Wallet Exchange
Codeforces
800
原题
←B →
翻译中…

Alice and Bob are bored, so they decide to play a game with their wallets. Alice has $a$ coins in her wallet, while Bob has $b$ coins in his wallet.

翻译中…

Both players take turns playing, with Alice making the first move. In each turn, the player will perform the following steps in order:

翻译中…
  1. Choose to exchange wallets with their opponent, or to keep their current wallets.
  2. Remove $1$ coin from the player's current wallet. The current wallet cannot have $0$ coins before performing this step.
翻译中…

The player who cannot make a valid move on their turn loses. If both Alice and Bob play optimally, determine who will win the game.

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Input

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Each test contains multiple test cases. The first line contains a single integer $t$ ($1 \leq t \leq 1000$) — the number of test cases. The description of the test cases follows.

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The first and only line of each test case contains two integers $a$ and $b$ ($1 \le a, b \le 10^9$) — the number of coins in Alice's and Bob's wallets, respectively.

翻译中…

Output

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For each test case, output "Alice" if Alice will win the game, and "Bob" if Bob will win the game.

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Note

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In the first test case, an example of the game is shown below:

翻译中…
  • Alice chooses to not swap wallets with Bob in step 1 of her move. Now, $a=0$ and $b=1$.
  • Since Alice's wallet is empty, Bob must choose to not swap their wallets in step 1 of his move. Now, $a=0$ and $b=0$.
  • Since both Alice's and Bob's wallets are empty, Alice is unable to make a move. Hence, Bob wins.
翻译中…

In the second test case, an example of the game is shown below:

翻译中…
  • Alice chooses to swap wallets with Bob in step 1 of her move. Now, $a=3$ and $b=1$.
  • Bob chooses to swap wallets with Alice in step 1 of his move. Now, $a=1$ and $b=2$.
  • Alice chooses to not swap wallets with Bob in step 1 of her move. Now, $a=0$ and $b=2$.
  • Since Alice's wallet is empty, Bob can only choose to not swap wallets with Alice in step 1 of his move. Now, $a=0$ and $b=1$.
  • Since Alice's wallet is empty, Alice can only choose to swap wallets with Bob in step 1 of her move. Now, $a=0$ and $b=0$.
  • Since both Alice's wallet and Bob's wallet are empty, Bob is unable to make a move. Hence, Alice wins.
翻译中…

样例

Input #1
10
1 1
1 4
5 3
4 5
11 9
83 91
1032 9307
839204 7281
1000000000 1000000000
53110 2024
Output #1
Bob
Alice
Bob
Alice
Bob
Bob
Alice
Alice
Bob
Bob
InputCopy OutputCopy
题目信息
题号
1919A
所属比赛
时间限制
1 s
内存限制
256 MB
标签
博弈论
数学

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