Codeforces Round 658 (Div. 2)
B
Sequential Nim
Codeforces
1100
原题
← AC1 →
翻译中…

There are $n$ piles of stones, where the $i$-th pile has $a_i$ stones. Two people play a game, where they take alternating turns removing stones.

翻译中…

In a move, a player may remove a positive number of stones from the first non-empty pile (the pile with the minimal index, that has at least one stone). The first player who cannot make a move (because all piles are empty) loses the game. If both players play optimally, determine the winner of the game.

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Input

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The first line contains a single integer $t$ ($1\le t\le 1000$)  — the number of test cases. Next $2t$ lines contain descriptions of test cases.

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The first line of each test case contains a single integer $n$ ($1\le n\le 10^5$)  — the number of piles.

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The second line of each test case contains $n$ integers $a_1,\ldots,a_n$ ($1\le a_i\le 10^9$)  — $a_i$ is equal to the number of stones in the $i$-th pile.

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It is guaranteed that the sum of $n$ for all test cases does not exceed $10^5$.

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Output

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For each test case, if the player who makes the first move will win, output "First". Otherwise, output "Second".

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Note

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In the first test case, the first player will win the game. His winning strategy is:

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  1. The first player should take the stones from the first pile. He will take $1$ stone. The numbers of stones in piles will be $[1, 5, 4]$.
  2. The second player should take the stones from the first pile. He will take $1$ stone because he can't take any other number of stones. The numbers of stones in piles will be $[0, 5, 4]$.
  3. The first player should take the stones from the second pile because the first pile is empty. He will take $4$ stones. The numbers of stones in piles will be $[0, 1, 4]$.
  4. The second player should take the stones from the second pile because the first pile is empty. He will take $1$ stone because he can't take any other number of stones. The numbers of stones in piles will be $[0, 0, 4]$.
  5. The first player should take the stones from the third pile because the first and second piles are empty. He will take $4$ stones. The numbers of stones in piles will be $[0, 0, 0]$.
  6. The second player will lose the game because all piles will be empty.
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样例

Input #1
7
3
2 5 4
8
1 1 1 1 1 1 1 1
6
1 2 3 4 5 6
6
1 1 2 1 2 2
1
1000000000
5
1 2 2 1 1
3
1 1 1
Output #1
First
Second
Second
First
First
Second
First
InputCopy OutputCopy
题目信息
题号
1382B
时间限制
1 s
内存限制
256 MB
标签
动态规划
博弈论

题面与样例版权归 Codeforces 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。