結果

問題 No.1368 サイクルの中に眠る門松列
ユーザー GER_chen
提出日時 2021-01-29 21:47:45
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 1,523 bytes
コンパイル時間 169 ms
コンパイル使用メモリ 81,920 KB
実行使用メモリ 108,032 KB
最終ジャッジ日時 2024-06-27 08:01:50
合計ジャッジ時間 3,382 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1
other AC * 13 WA * 2
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

import sys;input = lambda: sys.stdin.readline().rstrip()
#import heapq
#from collections import deque
#import numpy as np
#from collections import Counter as cnt
#from collections import defaultdict as ddc
#from math import factorial as fct
#from math import gcd
#from bisect import bisect_left as bsl
#from bisect import bisect_right as bsr
#from itertools import accumulate as acc
#from itertools import combinations as cmb
#from itertools import permutations as pmt
#from itertools import product as prd
#from functools import reduce as red
#import sys
#sys.setrecursionlimit(10**9)  #再帰を多く使う(デフォルトは1000)
for _ in range(int(input())):
    n = int(input())
    A = list(map(int,input().split()))
    A += A[:2]
    K = [0]*n
    for i in range(n):
        S = A[i:i+3]
        if len(set(S)) == 3 and S[1] in {min(S), max(S)}:
            K[i] = S[0]
    DP0 = [0]*n
    DP0[0], DP0[1], DP0[2] = K[0], K[0], K[0]
    for i in range(3, n):
        DP0[i] = max(DP0[i-1], DP0[i-2], DP0[i-3]+K[i])
    cand0 = DP0[-3]
    
    DP1 = [0]*n
    DP1[0], DP1[1], DP1[2] = 0, K[1], K[1]
    if n >3:
        DP1[3] = K[1]
    for i in range(4, n):
        DP1[i] = max(DP1[i-1], DP1[i-2], DP1[i-3]+K[i])
    cand1 = DP1[-2]
    
    DP2 = [0]*n
    DP2[0], DP2[1], DP2[2] = 0, 0, K[2]
    if n > 3:
        DP2[3] = K[2]
        if n >4:
            DP2[4] = K[2]
    for i in range(5, n):
        DP2[i] = max(DP2[i-1], DP2[i-2], DP2[i-3]+K[i])
    cand2 = DP2[-1]
    print(max(cand0, cand1, cand2))
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