結果

問題 No.921 ずんだアロー
ユーザー McGregorshMcGregorsh
提出日時 2023-05-17 12:53:41
言語 PyPy3
(7.3.15)
結果
WA  
実行時間 -
コード長 2,043 bytes
コンパイル時間 408 ms
コンパイル使用メモリ 82,560 KB
実行使用メモリ 104,576 KB
最終ジャッジ日時 2024-05-08 23:22:33
合計ジャッジ時間 6,473 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 165 ms
89,216 KB
testcase_01 AC 150 ms
89,472 KB
testcase_02 AC 156 ms
89,344 KB
testcase_03 AC 144 ms
89,088 KB
testcase_04 AC 148 ms
89,216 KB
testcase_05 AC 149 ms
89,216 KB
testcase_06 AC 150 ms
88,960 KB
testcase_07 AC 147 ms
89,344 KB
testcase_08 AC 148 ms
89,088 KB
testcase_09 AC 147 ms
89,216 KB
testcase_10 AC 175 ms
102,400 KB
testcase_11 WA -
testcase_12 AC 157 ms
89,984 KB
testcase_13 AC 163 ms
98,432 KB
testcase_14 AC 166 ms
100,224 KB
testcase_15 AC 160 ms
94,720 KB
testcase_16 AC 156 ms
89,984 KB
testcase_17 AC 172 ms
101,504 KB
testcase_18 AC 178 ms
104,576 KB
testcase_19 AC 179 ms
104,192 KB
testcase_20 WA -
testcase_21 AC 178 ms
104,064 KB
testcase_22 AC 180 ms
104,064 KB
testcase_23 AC 177 ms
104,320 KB
testcase_24 AC 173 ms
104,320 KB
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 #

import sys, re
from fractions import Fraction
from math import ceil, floor, sqrt, pi, factorial, gcd
from copy import deepcopy
from collections import Counter, deque, defaultdict
from heapq import heapify, heappop, heappush
from itertools import accumulate, product, combinations, combinations_with_replacement, permutations
from bisect import bisect, bisect_left, bisect_right
from functools import reduce
from decimal import Decimal, getcontext, ROUND_HALF_UP
def i_input(): return int(input())
def i_map(): return map(int, input().split())
def i_list(): return list(i_map())
def i_row(N): return [i_input() for _ in range(N)]
def i_row_list(N): return [i_list() for _ in range(N)]
def s_input(): return input()
def s_map(): return input().split()
def s_list(): return list(s_map())
def s_row(N): return [s_input for _ in range(N)]
def s_row_str(N): return [s_list() for _ in range(N)]
def s_row_list(N): return [list(s_input()) for _ in range(N)]
def lcm(a, b): return a * b // gcd(a, b)
def get_distance(x1, y1, x2, y2):
	  d = sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)
	  return d
def rotate(table):
   	  n_fild = []
   	  for x in zip(*table[::-1]):
   	  	  n_fild.append(x)
   	  return n_fild
sys.setrecursionlimit(10 ** 7)
INF = float('inf')
MOD = 10 ** 9 + 7
MOD2 = 998244353


def main():
   
   N = int(input())
   A = i_list()
   
   juge1 = [False] * N
   for i in range(0, N, 2):
   	  juge1[i] = True
   
   for i in range(1, N, 2):
   	  if i == N-1:
   	  	  if A[i-1] == A[i]:
   	  	  	  juge1[i] = True
   	  else:
   	  	  if A[i-1] == A[i] == A[i+1]:
   	  	  	  juge1[i] = True
   	  
   	  
   juge2 = [False] * N
   for i in range(1, N, 2):
   	  juge2[i] = True
   
   for i in range(0, N, 2):
   	  if i == 0:
   	  	  if A[i] == A[i+1]:
   	  	  	  juge2[i] = True
   	  elif i == N-1:
   	  	  if A[i-1] == A[i]:
   	  	  	  juge2[i] = True
   	  else:
   	  	  if A[i-1] == A[i] == A[i+1]:
   	  	  	  juge2[i] = True
   
   print(max(sum(juge1), sum(juge2)))
   
   
   
if __name__ == '__main__':
    main()
    
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