QOJ.ac

QOJ

Time Limit: 5 s Memory Limit: 256 MB Total points: 100

#963. 移除質數

Statistics

兩名玩家使用一個正整數陣列進行遊戲。他們輪流進行操作,無法進行操作的玩家即為輸家。在一次操作中,你必須選擇一個質數 $p$ 以及陣列的一個非空區間 $[l; r]$,使得該區間內的所有數字都能被 $p$ 整除,然後將這些數字中的所有因數 $p$ 移除。移除所有因數的意思是,我們將一個數字不斷除以 $p$,直到它不能再被 $p$ 整除為止。

若兩名玩家皆採取最佳策略,請判斷誰會獲勝。

輸入格式

第一行包含一個整數 $n$ ($1 \le n \le 1000$),代表陣列的大小。 第二行包含陣列中的整數 $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 10^{18}$)。

輸出格式

若先手玩家獲勝,請輸出「First」(不含引號);否則輸出「Second」(不含引號)。

範例

範例輸入 1

3
2 8 4

範例輸出 1

First

範例輸入 2

3
2 12 3

範例輸出 2

Second

Discussions

About Discussions

The discussion section is only for posting: General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.

This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.

Open Discussions 0
No discussions in this category.

Issues

About Issues

If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.

Guidelines:

  1. This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
  2. Do not submit duplicated issues.
  3. Issues must be filed in English or Chinese only.
Active Issues 0
No issues in this category.
Closed/Resolved Issues 0
No issues in this category.