結果
| 問題 |
No.2157 崖
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-20 20:23:43 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 1,788 bytes |
| コンパイル時間 | 231 ms |
| コンパイル使用メモリ | 82,360 KB |
| 実行使用メモリ | 218,336 KB |
| 最終ジャッジ日時 | 2025-03-20 20:25:51 |
| 合計ジャッジ時間 | 11,767 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 10 TLE * 1 -- * 11 |
ソースコード
import bisect
def main():
import sys
input = sys.stdin.read().split()
idx = 0
N, M = map(int, input[idx:idx+2])
idx += 2
D = []
for _ in range(N):
row = list(map(int, input[idx:idx+M]))
idx += M
D.append(sorted(row)) # Pre-sort each difficulty tier
# Check if any solution exists at all by checking with a very large d
def is_possible(d):
possible_prev = D[0].copy()
possible_prev.sort()
for i in range(1, N):
current_D = D[i]
current_possible = []
possible_prev_sorted = possible_prev
for y in current_D:
# Find if there exists x_prev in possible_prev such that x_prev <= y and y - x_prev <= d
low = y - d
# Find the first x >= low in possible_prev
left_idx = bisect.bisect_left(possible_prev_sorted, low)
if left_idx < len(possible_prev_sorted) and possible_prev_sorted[left_idx] <= y:
current_possible.append(y)
if not current_possible:
return False
# Use a set to avoid duplicates and sort to maintain order
current_possible = sorted(list(set(current_possible)))
possible_prev = current_possible
return True
# Check if even the maximum possible d can't form a sequence
if not is_possible(10**18):
print(-1)
return
# Binary search for the minimum possible d
left = 0
right = 10**18
answer = 10**18
while left <= right:
mid = (left + right) // 2
if is_possible(mid):
answer = mid
right = mid - 1
else:
left = mid + 1
print(answer)
if __name__ == '__main__':
main()
lam6er