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 18:23:55 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 2,165 bytes |
| コンパイル時間 | 229 ms |
| コンパイル使用メモリ | 82,404 KB |
| 実行使用メモリ | 80,536 KB |
| 最終ジャッジ日時 | 2025-06-12 18:24:38 |
| 合計ジャッジ時間 | 39,224 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 MLE * 1 |
| other | AC * 1 TLE * 3 MLE * 23 |
ソースコード
import sys
from collections import defaultdict
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 >= 0:
s_list[i] = str(int(s_list[i]) - 1)
new_s = ''.join(s_list).lstrip('0')
if not new_s:
return '0'
return new_s
def count_valid_numbers(X_str):
if X_str == '0':
return 0
n = len(X_str)
dp = defaultdict(int)
dp[(0, 0, False, True, True)] = 1
for i in range(n):
next_dp = defaultdict(int)
current_digit = int(X_str[i])
for state, cnt in dp.items():
sum_mod3, mod8, has_three, tight, leading_zero = state
max_d = current_digit 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)
if new_leading_zero:
new_sum_mod3 = 0
new_mod8 = 0
else:
if leading_zero:
new_sum_mod3 = d % 3
new_mod8 = d % 8
else:
new_sum_mod3 = (sum_mod3 + d) % 3
new_mod8 = (mod8 * 10 + d) % 8
new_has_three = has_three or (d == 3)
new_state = (new_sum_mod3, new_mod8, new_has_three, new_tight, new_leading_zero)
next_dp[new_state] = (next_dp[new_state] + cnt) % MOD
dp = next_dp
total = 0
for state, cnt in dp.items():
sum_mod3, mod8, has_three, _, leading_zero = state
if leading_zero:
continue
condition1 = (sum_mod3 == 0) or has_three
condition2 = (mod8 != 0)
if condition1 and condition2:
total = (total + cnt) % MOD
return total
def main():
A, B = sys.stdin.readline().split()
A_minus_1 = subtract_one(A)
count_B = count_valid_numbers(B)
count_A_minus_1 = count_valid_numbers(A_minus_1)
result = (count_B - count_A_minus_1) % MOD
print(result)
if __name__ == "__main__":
main()
gew1fw