結果
| 問題 | No.685 Logical Operations |
| コンテスト | |
| ユーザー |
norioc
|
| 提出日時 | 2026-01-07 13:04:43 |
| 言語 | PyPy3 (7.3.17) |
| 結果 |
AC
|
| 実行時間 | 47 ms / 2,000 ms |
| コード長 | 1,962 bytes |
| 記録 | |
| コンパイル時間 | 290 ms |
| コンパイル使用メモリ | 82,204 KB |
| 実行使用メモリ | 62,624 KB |
| 最終ジャッジ日時 | 2026-01-07 13:04:46 |
| 合計ジャッジ時間 | 2,949 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 27 |
ソースコード
from collections.abc import Iterable
def accum_dp(xs: Iterable, f, op, e, init: dict, *, is_reset=True):
dp = init.copy()
for x in xs:
pp = {} if is_reset else dp.copy()
dp, pp = pp, dp
for fm_key, fm_val in pp.items():
for to_key, to_val in f(fm_key, fm_val, x):
dp[to_key] = op(dp.get(to_key, e), to_val)
return dp
def f(k, v, x):
state, xlt, ylt = k # (state, 未満か)
ds = [(0, 0), (0, 1), (1, 0), (1, 1)]
if state == 0:
for xd, yd in ds:
if not xlt and xd > x: continue
if not ylt and yd > x: continue
if xd > yd: continue
if xd == yd == 1: continue
n_xlt = xlt | (xd < x)
n_ylt = ylt | (yd < x)
if xd < yd:
yield (state+1, n_xlt, n_ylt), v
else:
yield (state, n_xlt, n_ylt), v
elif state == 1: # x < y かつ (x and y) < (x xor y)
for xd, yd in ds:
if not xlt and xd > x: continue
if not ylt and yd > x: continue
n_xlt = xlt | (xd < x)
n_ylt = ylt | (yd < x)
if xd == yd == 1:
yield (state+1, n_xlt, n_ylt), v
else:
yield (state, n_xlt, n_ylt), v
elif state == 2:
for xd, yd in ds:
if not xlt and xd > x: continue
if not ylt and yd > x: continue
n_xlt = xlt | (xd < x)
n_ylt = ylt | (yd < x)
yield (state, n_xlt, n_ylt), v
else:
assert False
def op(a, b):
return (a + b) % MOD
def digit_dp(n: int) -> int:
digits = [int(c) for c in bin(n)[2:]]
init = {(0, False, False): 1}
dp = accum_dp(digits, f, op, 0, init)
res = 0
for (state, _, _), v in dp.items():
if state == 2:
res += v
res %= MOD
return res
MOD = 10**9 + 7
N = int(input())
ans = digit_dp(N)
print(ans)
norioc