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 | 2025-04-16 15:25:10 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 775 ms / 1,000 ms |
| コード長 | 2,081 bytes |
| コンパイル時間 | 471 ms |
| コンパイル使用メモリ | 81,340 KB |
| 実行使用メモリ | 176,384 KB |
| 最終ジャッジ日時 | 2025-04-16 15:26:06 |
| 合計ジャッジ時間 | 18,334 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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():
# Read input
A = []
for _ in range(19):
parts = list(map(int, sys.stdin.readline().split()))
L_i = parts[0]
A_i = parts[1:] if L_i > 0 else []
A.append(A_i)
# Precompute mask_gt for x from 1 to 19
mask_gt = [0] * 20 # x ranges from 1 to 19
for x in range(1, 20):
mask_gt[x] = ((1 << 19) - 1) ^ ((1 << x) - 1)
# Initialize DP with a dictionary to track active masks and their even/odd counts
prev = {0: (1, 0)} # mask: (even_count, odd_count)
for step in range(19):
current_A = A[step]
if not current_A:
prev = {}
break
curr = defaultdict(lambda: [0, 0]) # key: mask, value: [even, odd]
for mask in prev:
even_prev, odd_prev = prev[mask]
for x in current_A:
if (mask & (1 << (x - 1))) != 0:
continue # x is already used
mg = mask_gt[x]
k = (mask & mg).bit_count()
new_mask = mask | (1 << (x - 1))
# Process even_prev
if even_prev > 0:
new_parity = (0 + k) % 2
if new_parity == 0:
curr[new_mask][0] += even_prev
else:
curr[new_mask][1] += even_prev
# Process odd_prev
if odd_prev > 0:
new_parity = (1 + k) % 2
if new_parity == 0:
curr[new_mask][0] += odd_prev
else:
curr[new_mask][1] += odd_prev
# Update prev to curr, filtering out masks with zero counts
new_prev = {}
for m in curr:
even, odd = curr[m]
if even + odd > 0:
new_prev[m] = (even, odd)
prev = new_prev
full_mask = (1 << 19) - 1
X_even, X_odd = prev.get(full_mask, (0, 0))
print(X_even, X_odd)
if __name__ == "__main__":
main()
lam6er