結果
| 問題 |
No.783 門松計画
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-26 15:50:13 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 1,330 ms / 2,000 ms |
| コード長 | 2,359 bytes |
| コンパイル時間 | 284 ms |
| コンパイル使用メモリ | 82,320 KB |
| 実行使用メモリ | 97,808 KB |
| 最終ジャッジ日時 | 2025-03-26 15:50:59 |
| 合計ジャッジ時間 | 4,533 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 27 |
ソースコード
import sys
from collections import defaultdict
def main():
N, C = map(int, sys.stdin.readline().split())
L = list(map(int, sys.stdin.readline().split()))
W = list(map(int, sys.stdin.readline().split()))
def is_kadomatsu(a, b, c):
if a == b or b == c or a == c:
return False
if (b > a and b > c) or (b < a and b < c):
return True
return False
# Initialize DP: dp[cost] -> dictionary of (a, b, flag) : max_total
dp = [defaultdict(int) for _ in range(C + 1)]
dp[0][(None, None, False)] = 0
for current_cost in range(C + 1):
current_states = list(dp[current_cost].items())
for state_info in current_states:
(a_prev_prev, a_prev, flag), current_total = state_info
for k in range(N):
Lk = L[k]
Wk = W[k]
new_cost = current_cost + Wk
if new_cost > C:
continue
# Transition
if a_prev_prev is None:
# Previous state has length 0 or 1
new_a_prev_prev = a_prev
new_a_prev = Lk
new_flag = flag # No kadomatsu formed yet
new_state = (new_a_prev_prev, new_a_prev, new_flag)
new_total = current_total + Lk
if new_total > dp[new_cost].get(new_state, 0):
dp[new_cost][new_state] = new_total
else:
# Check if a_prev_prev, a_prev, Lk form a kadomatsu
if is_kadomatsu(a_prev_prev, a_prev, Lk):
new_a_prev_prev = a_prev
new_a_prev = Lk
new_flag = flag or True # Once flag is True, it remains True
new_state = (new_a_prev_prev, new_a_prev, new_flag)
new_total = current_total + Lk
if new_total > dp[new_cost].get(new_state, 0):
dp[new_cost][new_state] = new_total
max_total = 0
for cost in range(C + 1):
for state in dp[cost]:
a, b, flag = state
if flag and dp[cost][state] > max_total:
max_total = dp[cost][state]
print(max_total)
if __name__ == "__main__":
main()
lam6er