結果
| 問題 |
No.2374 ASKT Subsequences
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-07-07 22:53:19 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,593 bytes |
| コンパイル時間 | 603 ms |
| コンパイル使用メモリ | 82,176 KB |
| 実行使用メモリ | 141,696 KB |
| 最終ジャッジ日時 | 2024-07-21 19:09:12 |
| 合計ジャッジ時間 | 6,252 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 10 WA * 18 |
ソースコード
#!/usr/bin/env python3
import sys
from bisect import bisect_left, bisect_right, insort_left, insort_right # type: ignore
from collections import Counter, defaultdict, deque # type: ignore
from math import gcd, sqrt, ceil # type: ignore
from heapq import heapify, heappop, heappush, heappushpop, heapreplace, merge # type: ignore
from itertools import accumulate, combinations, permutations, product # type: ignore
from string import ascii_lowercase, ascii_uppercase # type: ignore
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def I(): return int(sys.stdin.buffer.readline())
def LS(): return sys.stdin.buffer.readline().rstrip().decode("utf-8").split()
def S(): return sys.stdin.buffer.readline().rstrip().decode("utf-8")
def IR(n): return [I() for _ in range(n)]
def LIR(n): return [LI() for _ in range(n)]
def SR(n): return [S() for _ in range(n)]
def LSR(n): return [LS() for _ in range(n)]
def SRL(n): return [list(S()) for _ in range(n)]
N = I()
A = LI()
num = [[] for _ in range(2020)]
cnt = [[0]*(N+1) for _ in range(2020)]
for i,a in enumerate(A):
num[a].append(i)
for j in num[a-1]:
cnt[a-1][j+1]+=1
cnt[a-1][i]-=1
for i in range(2020):
cnt[i] = list(accumulate(cnt[i]))
for i in range(2019,0,-1):
for j in range(N+1):
cnt[i-1][j] += cnt[i][j]
ans = 0
for i in range(N):
a1 = A[i]
for k in num[a1+10]:
if k-i<2: continue
a3 = A[k]
# if cnt[a3+1][k]>0:
# print(i,k,a3+1,cnt[a3+1][k])
# print(cnt[a3+1])
ans += cnt[a3+1][k]-cnt[a3+1][i]
print(ans)