結果
| 問題 |
No.1375 Divide and Update
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-20 18:46:42 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 150 ms / 2,000 ms |
| コード長 | 1,657 bytes |
| コンパイル時間 | 136 ms |
| コンパイル使用メモリ | 82,172 KB |
| 実行使用メモリ | 141,712 KB |
| 最終ジャッジ日時 | 2025-03-20 18:47:04 |
| 合計ジャッジ時間 | 4,351 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 19 |
ソースコード
def main():
import sys
input = sys.stdin.read().split()
idx = 0
N = int(input[idx])
idx += 1
X = int(input[idx])
idx += 1
Y = int(input[idx])
idx += 1
a = list(map(int, input[idx:idx + N]))
idx += N
S = sum(a)
x_gain = [X - num for num in a]
y_gain = [Y - num for num in a]
# Compute left_max using Kadane's algorithm
left_max = [0] * (N + 2) # 1-based indexing, up to N
current_max = 0
max_so_far = -float('inf')
for i in range(1, N + 1):
current_max = max(x_gain[i - 1], current_max + x_gain[i - 1])
if current_max > max_so_far:
max_so_far = current_max
left_max[i] = max_so_far
# Compute right_max using Kadane's algorithm from right
right_max = [0] * (N + 2)
current_max = 0
max_so_far = -float('inf')
for i in range(N, 0, -1):
current_max = max(y_gain[i - 1], current_max + y_gain[i - 1])
if current_max > max_so_far:
max_so_far = current_max
right_max[i] = max_so_far
# For each M from 2 to N-1 (M is from 2 to N-1)
# M starts from 2, and in the problem, outputs M = i+1 (for i from 1 to N-2)
results = []
for M in range(2, N):
left_part = M - 1
right_part = M + 1
if left_part < 1:
gain_left = 0
else:
gain_left = left_max[left_part]
if right_part > N:
gain_right = 0
else:
gain_right = right_max[right_part]
total = S + gain_left + gain_right
results.append(total)
print('\n'.join(map(str, results)))
if __name__ == '__main__':
main()
lam6er