結果
| 問題 |
No.2152 [Cherry Anniversary 2] 19 Petals of Cherry
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-15 21:20:56 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 693 ms / 1,000 ms |
| コード長 | 1,881 bytes |
| コンパイル時間 | 412 ms |
| コンパイル使用メモリ | 82,156 KB |
| 実行使用メモリ | 146,392 KB |
| 最終ジャッジ日時 | 2025-04-15 21:26:48 |
| 合計ジャッジ時間 | 15,584 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 49 |
ソースコード
import sys
from collections import defaultdict
def main():
allowed = [set() for _ in range(20)] # 1-based index for positions 1-19
for i in range(1, 20):
parts = list(map(int, sys.stdin.readline().split()))
L_i = parts[0]
if L_i > 0:
allowed[i] = set(parts[1:1+L_i])
else:
allowed[i] = set()
# Precompute greater_mask for each a
greater_mask = [0] * 20 # a ranges from 1 to 19
for a in range(1, 20):
mask = 0
for elem in range(a + 1, 20):
mask |= 1 << (elem - 1)
greater_mask[a] = mask
# Initialize DP
dp = defaultdict(lambda: [0, 0])
dp[0] = [1, 0] # mask 0, even count 1, odd 0
for i in range(1, 20):
next_dp = defaultdict(lambda: [0, 0])
current_allowed = allowed[i]
if not current_allowed:
# No possible permutations, break early
dp = defaultdict(lambda: [0, 0])
break
for mask, (even, odd) in dp.items():
if even == 0 and odd == 0:
continue
for a in current_allowed:
if (mask & (1 << (a - 1))) != 0:
continue # a is already used
# Compute c
c = (mask & greater_mask[a]).bit_count()
new_mask = mask | (1 << (a - 1))
# Update even
if even > 0:
new_p = (0 + c) % 2
next_dp[new_mask][new_p] += even
# Update odd
if odd > 0:
new_p = (1 + c) % 2
next_dp[new_mask][new_p] += odd
dp = next_dp
full_mask = (1 << 19) - 1
X_even = dp.get(full_mask, [0, 0])[0]
X_odd = dp.get(full_mask, [0, 0])[1]
print(X_even, X_odd)
if __name__ == "__main__":
main()
lam6er