CF1772E.Permutation Game
普及/提高-
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题目描述
Two players are playing a game. They have a permutation of integers 1 , 2 , ..., n (a permutation is an array where each element from 1 to n occurs exactly once). The permutation is not sorted in either ascending or descending order (i. e. the permutation does not have the form [1,2,…,n] or [n,n−1,…,1] ).
Initially, all elements of the permutation are colored red. The players take turns. On their turn, the player can do one of three actions:
- rearrange the elements of the permutation in such a way that all red elements keep their positions (note that blue elements can be swapped with each other, but it's not obligatory);
- change the color of one red element to blue;
- skip the turn.
The first player wins if the permutation is sorted in ascending order (i. e. it becomes [1,2,…,n] ). The second player wins if the permutation is sorted in descending order (i. e. it becomes [n,n−1,…,1] ). If the game lasts for 100500 turns and nobody wins, it ends in a draw.
Your task is to determine the result of the game if both players play optimally.
输入格式
The first line contains a single integer t ( 1≤t≤105 ) — the number of test cases.
The first line of each test case contains a single integer n ( 3≤n≤5⋅105 ) — the size of the permutation.
The second line contains n integers p1,p2,…,pn — the permutation itself. The permutation p is not sorted in either ascending or descending order.
The sum of n over all test cases does not exceed 5⋅105 .
输出格式
For each test case, print First if the first player wins, Second if the second player wins, and Tie if the result is a draw.
输入输出样例
输入#1
4 4 1 2 4 3 3 2 3 1 5 3 4 5 2 1 6 1 5 6 3 2 4
输出#1
First Tie Second Tie
说明/提示
Let's show how the first player wins in the first example.
They should color the elements 3 and 4 blue during their first two turns, and then they can reorder the blue elements in such a way that the permutation becomes [1,2,3,4] . The second player can neither interfere with this strategy nor win faster.