結果
| 問題 |
No.260 世界のなんとか3
|
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-03-31 17:20:45 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 2,196 bytes |
| コンパイル時間 | 150 ms |
| コンパイル使用メモリ | 82,404 KB |
| 実行使用メモリ | 236,316 KB |
| 最終ジャッジ日時 | 2025-03-31 17:21:57 |
| 合計ジャッジ時間 | 4,171 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 MLE * 1 |
| other | MLE * 1 -- * 26 |
ソースコード
import sys
from collections import defaultdict
MOD = 10**9 + 7
def decrement_string(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 < 0:
return '0'
s_list[i] = str(int(s_list[i]) - 1)
result = ''.join(s_list).lstrip('0')
return result if result else '0'
def compute(s):
digits = list(map(int, s))
n = len(digits)
dp = [defaultdict(int) for _ in range(n + 1)]
dp[0][(True, True, False, 0, 0)] = 1
for pos in range(n):
current_dp = dp[pos]
next_dp = defaultdict(int)
for state, count in current_dp.items():
tight, leading_zero, has_three, sum_mod3, num_mod8 = state
max_d = digits[pos] if tight else 9
for d in range(0, max_d + 1):
new_tight = tight and (d == max_d)
new_leading_zero = leading_zero and (d == 0)
new_has_three = has_three or (d == 3)
if leading_zero:
if d == 0:
new_sum_mod3 = sum_mod3
else:
new_sum_mod3 = d % 3
else:
new_sum_mod3 = (sum_mod3 + d) % 3
if new_leading_zero:
new_num_mod8 = 0
else:
if leading_zero:
new_num_mod8 = d % 8
else:
new_num_mod8 = (num_mod8 * 10 + d) % 8
new_state = (new_tight, new_leading_zero, new_has_three, new_sum_mod3, new_num_mod8)
next_dp[new_state] = (next_dp[new_state] + count) % MOD
dp[pos + 1] = next_dp
total = 0
for state, count in dp[n].items():
tight, leading_zero, has_three, sum_mod3, num_mod8 = state
if leading_zero:
continue
if (has_three or (sum_mod3 == 0)) and (num_mod8 != 0):
total = (total + count) % MOD
return total
def main():
A, B = sys.stdin.readline().split()
a_minus_1 = decrement_string(A)
ans = (compute(B) - compute(a_minus_1)) % MOD
print(ans)
if __name__ == "__main__":
main()
lam6er