結果
| 問題 |
No.1676 Coin Trade (Single)
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-26 15:56:16 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 209 ms / 2,000 ms |
| コード長 | 1,441 bytes |
| コンパイル時間 | 192 ms |
| コンパイル使用メモリ | 82,748 KB |
| 実行使用メモリ | 116,552 KB |
| 最終ジャッジ日時 | 2025-03-26 15:56:47 |
| 合計ジャッジ時間 | 5,576 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 35 |
ソースコード
def main():
import sys
input = sys.stdin.read().split()
ptr = 0
N, K = int(input[ptr]), int(input[ptr+1])
ptr += 2
A = []
B = []
for _ in range(N):
Ai = int(input[ptr])
Mi = int(input[ptr+1])
ptr += 2
Bi = list(map(int, input[ptr:ptr+Mi])) if Mi > 0 else []
ptr += Mi
A.append(Ai)
B.append(Bi)
cash = [-float('inf')] * (N + 1)
hold = [-float('inf')] * (N + 1)
cash[0] = 0 # Initial state: no coins
for i in range(1, N+1):
Ai = A[i-1]
Bi = B[i-1]
max_val = -float('inf')
for j in Bi:
j_idx = j # j is 1-based in input, converted to 0-based in the list
current_val = hold[j_idx] - A[j_idx-1] # j is 1-based in input
if current_val > max_val:
max_val = current_val
new_hold_candidate = -float('inf')
if Bi:
new_hold_candidate = max_val + Ai
# Compute new_hold
prev_hold = hold[i-1]
prev_cash = cash[i-1]
new_hold = max(prev_hold, prev_cash)
if new_hold_candidate != -float('inf'):
new_hold = max(new_hold, new_hold_candidate)
# Compute new_cash
new_cash = max(prev_cash, new_hold)
cash[i] = new_cash
hold[i] = new_hold
print(cash[N])
if __name__ == "__main__":
main()
lam6er