結果
| 問題 |
No.260 世界のなんとか3
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 15:12:26 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 1,848 bytes |
| コンパイル時間 | 467 ms |
| コンパイル使用メモリ | 82,688 KB |
| 実行使用メモリ | 104,244 KB |
| 最終ジャッジ日時 | 2025-06-12 15:12:35 |
| 合計ジャッジ時間 | 4,809 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 MLE * 1 |
| other | AC * 1 MLE * 26 |
ソースコード
from functools import lru_cache
MOD = 10**9 + 7
def subtract_one(s):
s_list = list(s)
i = len(s_list) - 1
while i >= 0 and s_list[i] == '0':
s_list[i] = '9'
i -= 1
if i == -1:
return '0'
s_list[i] = str(int(s_list[i]) - 1)
if s_list[0] == '0' and len(s_list) > 1:
result = ''.join(s_list).lstrip('0')
return result if result else '0'
return ''.join(s_list)
def count_ahoh_not_young(s):
n = len(s)
digits = list(map(int, s))
@lru_cache(maxsize=None)
def dp(pos, mod3, mod8, has3, tight, leading_zero):
if pos == n:
is_ahoh = (mod3 == 0) or has3
is_young = (mod8 == 0)
if is_ahoh and not is_young:
return 1
else:
return 0
limit = digits[pos] if tight else 9
total = 0
for d in range(0, limit + 1):
new_tight = tight and (d == limit)
new_leading_zero = leading_zero and (d == 0)
if new_leading_zero:
new_mod3 = 0
new_mod8 = 0
new_has3 = False
else:
new_mod3 = (mod3 * 10 + d) % 3
new_mod8 = (mod8 * 10 + d) % 8
new_has3 = has3 or (d == 3)
total += dp(pos + 1, new_mod3, new_mod8, new_has3, new_tight, new_leading_zero)
return total % MOD
result = dp(0, 0, 0, False, True, True)
dp.cache_clear()
return result
def main():
A, B = input().split()
count_B = count_ahoh_not_young(B)
A_minus_1 = subtract_one(A)
if A_minus_1 == '-1':
count_A_minus_1 = 0
else:
count_A_minus_1 = count_ahoh_not_young(A_minus_1) if A_minus_1 != '0' else 0
result = (count_B - count_A_minus_1) % MOD
print(result)
if __name__ == "__main__":
main()
gew1fw