結果
| 問題 |
No.2321 Continuous Flip
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 20:03:38 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,555 bytes |
| コンパイル時間 | 220 ms |
| コンパイル使用メモリ | 82,432 KB |
| 実行使用メモリ | 162,888 KB |
| 最終ジャッジ日時 | 2025-06-12 20:09:02 |
| 合計ジャッジ時間 | 4,965 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | TLE * 1 -- * 29 |
ソースコード
def main():
import sys
input = sys.stdin.read
data = input().split()
idx = 0
N = int(data[idx])
idx += 1
M = int(data[idx])
idx += 1
C = int(data[idx])
idx += 1
A = list(map(int, data[idx:idx+N]))
idx += N
operations = []
for _ in range(M):
L = int(data[idx])
idx += 1
R = int(data[idx])
idx += 1
operations.append((L-1, R-1)) # converting to 0-based
# Precompute prefix sums for A
prefix = [0] * (N + 1)
for i in range(N):
prefix[i+1] = prefix[i] + A[i]
# Function to compute sum of A[L..R]
def sum_A(L, R):
return prefix[R+1] - prefix[L]
# Calculate the gain for each operation
gains = []
for L, R in operations:
s = sum_A(L, R)
gains.append((s - C, L, R))
# Sort operations by gain in descending order
gains.sort(reverse=True)
# Initialize variables
flipped = [False] * N
current_sum = 0
X = 0
for g, L, R in gains:
if g <= 0:
break
# Calculate the current sum of the interval
total = 0
for i in range(L, R + 1):
if flipped[i]:
total -= A[i]
else:
total += A[i]
actual_gain = total - C
if actual_gain > 0:
# Perform the flip
X += 1
current_sum += actual_gain
for i in range(L, R + 1):
flipped[i] = not flipped[i]
print(current_sum)
if __name__ == '__main__':
main()
gew1fw