結果
問題 | No.121 傾向と対策:門松列(その2) |
ユーザー | Mao-beta |
提出日時 | 2024-03-11 16:51:35 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 4,764 ms / 5,000 ms |
コード長 | 2,618 bytes |
コンパイル時間 | 271 ms |
コンパイル使用メモリ | 82,552 KB |
実行使用メモリ | 486,592 KB |
最終ジャッジ日時 | 2024-09-29 22:03:47 |
合計ジャッジ時間 | 14,364 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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 | 221 ms
99,968 KB |
testcase_01 | AC | 277 ms
109,824 KB |
testcase_02 | AC | 109 ms
79,488 KB |
testcase_03 | AC | 1,440 ms
268,184 KB |
testcase_04 | AC | 4,764 ms
486,592 KB |
testcase_05 | AC | 1,580 ms
268,172 KB |
testcase_06 | AC | 1,383 ms
268,524 KB |
testcase_07 | AC | 1,392 ms
268,980 KB |
testcase_08 | AC | 1,554 ms
268,304 KB |
ソースコード
import sys import math import bisect from heapq import heapify, heappop, heappush from collections import deque, defaultdict, Counter from functools import lru_cache from itertools import accumulate, combinations, permutations, product sys.setrecursionlimit(1000000) MOD = 10 ** 9 + 7 MOD99 = 998244353 input = lambda: sys.stdin.readline().strip() NI = lambda: int(input()) NMI = lambda: map(int, input().split()) NLI = lambda: list(NMI()) SI = lambda: input() SMI = lambda: input().split() SLI = lambda: list(SMI()) EI = lambda m: [NLI() for _ in range(m)] class BIT(): """ BIT 0-index ACL for python add(p, x): p番目にxを加算 get(p): p番目を取得 sum0(r): [0:r)の和を取得 sum(l, r): [l:r)の和を取得 """ def __init__(self, N): self.n = N self.data = [0 for i in range(N)] def add(self, p, x): assert 0 <= p < self.n, "0<=p<n,p={0},n={1}".format(p, self.n) p += 1 while (p <= self.n): self.data[p - 1] += x p += p & -p def get(self, p): return self.sum(p, p + 1) def sum(self, l, r): assert (0 <= l and l <= r and r <= self.n), "0<=l<=r<=n,l={0},r={1},n={2}".format(l, r, self.n) return self.sum0(r) - self.sum0(l) def sum0(self, r): s = 0 while (r > 0): s += self.data[r - 1] r -= r & -r return s def debug(self): res = [self.get(p) for p in range(self.n)] return res def compress(S): """ 座標圧縮 """ S = set(S) zipped, unzipped = {}, {} for i, a in enumerate(sorted(S)): zipped[a] = i unzipped[i] = a return zipped, unzipped def main(): N = NI() A = NLI() Z, UZ = compress(A) A = [Z[a] for a in A] ZN = len(Z) lbit = BIT(ZN) rbit = BIT(ZN) sbit = BIT(ZN) lover = [0] * N rover = [0] * N lless = [0] * N rless = [0] * N LC = Counter() RC = Counter(A) same = 0 ans = 0 for i, a in enumerate(A): lover[i] = lbit.sum(a+1, ZN) lless[i] = lbit.sum(0, a) lbit.add(a, 1) RC[a] -= 1 ans -= sbit.sum(a+1, ZN) ans -= sbit.sum(0, a) x = sbit.get(a) sbit.add(a, -x) LC[a] += 1 sbit.add(a, LC[a] * RC[a]) for i, a in enumerate(A[::-1]): rover[N-1-i] = rbit.sum(a + 1, ZN) rless[N-1-i] = rbit.sum(0, a) rbit.add(a, 1) for i in range(N): ans += lover[i] * rover[i] ans += lless[i] * rless[i] print(ans) if __name__ == "__main__": main()