結果
| 問題 |
No.119 旅行のツアーの問題
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 16:54:05 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 1,265 ms / 5,000 ms |
| コード長 | 2,586 bytes |
| コンパイル時間 | 934 ms |
| コンパイル使用メモリ | 82,560 KB |
| 実行使用メモリ | 255,792 KB |
| 最終ジャッジ日時 | 2025-06-12 16:54:10 |
| 合計ジャッジ時間 | 4,437 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 * 4 |
| other | AC * 19 |
ソースコード
import sys
from collections import defaultdict
def main():
N = int(sys.stdin.readline())
B = []
C = []
for _ in range(N):
b, c = map(int, sys.stdin.readline().split())
B.append(b)
C.append(c)
M = int(sys.stdin.readline())
constraints = [[] for _ in range(N)]
for _ in range(M):
D, E = map(int, sys.stdin.readline().split())
constraints[D].append(E)
# Initialize DP: dictionary where key is mask, value is max satisfaction
dp = {0: 0}
for i in range(N):
next_dp = defaultdict(int)
for mask, current_max in dp.items():
# Option 1: do not include i
if mask in next_dp:
if current_max > next_dp[mask]:
next_dp[mask] = current_max
else:
next_dp[mask] = current_max
# Option 2: include i
if (mask >> i) & 1:
# Must take the tour
new_mask = mask
for e in constraints[i]:
new_mask |= (1 << e)
new_sat = current_max + B[i]
if new_mask in next_dp:
if new_sat > next_dp[new_mask]:
next_dp[new_mask] = new_sat
else:
next_dp[new_mask] = new_sat
else:
# Option a: take the tour
new_mask_a = mask
for e in constraints[i]:
new_mask_a |= (1 << e)
new_sat_a = current_max + B[i]
if new_mask_a in next_dp:
if new_sat_a > next_dp[new_mask_a]:
next_dp[new_mask_a] = new_sat_a
else:
next_dp[new_mask_a] = new_sat_a
# Option b: do not take the tour
new_mask_b = mask
new_sat_b = current_max + C[i]
if new_mask_b in next_dp:
if new_sat_b > next_dp[new_mask_b]:
next_dp[new_mask_b] = new_sat_b
else:
next_dp[new_mask_b] = new_sat_b
# Update dp to next_dp, keeping only the maximum for each mask
dp = {}
for mask in next_dp:
if mask in dp:
if next_dp[mask] > dp[mask]:
dp[mask] = next_dp[mask]
else:
dp[mask] = next_dp[mask]
if dp:
print(max(dp.values()))
else:
print(0)
if __name__ == '__main__':
main()
gew1fw