結果
問題 |
No.1243 約数加算
|
ユーザー |
![]() |
提出日時 | 2025-06-12 15:21:50 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 844 ms / 2,000 ms |
コード長 | 2,729 bytes |
コンパイル時間 | 347 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 80,832 KB |
最終ジャッジ日時 | 2025-06-12 15:21:55 |
合計ジャッジ時間 | 4,778 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 9 |
ソースコード
import sys import random import math def is_prime(n): if n < 2: return False for p in [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]: if n % p == 0: return n == p d = n - 1 s = 0 while d % 2 == 0: d //= 2 s += 1 for a in [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37]: if a >= n: continue x = pow(a, d, n) if x == 1 or x == n - 1: continue for _ in range(s - 1): x = pow(x, 2, n) if x == n - 1: break else: return False return True def pollards_rho(n): if n % 2 == 0: return 2 if n % 3 == 0: return 3 if n % 5 == 0: return 5 while True: c = random.randint(1, n - 1) f = lambda x: (pow(x, 2, n) + c) % n x, y, d = 2, 2, 1 while d == 1: x = f(x) y = f(f(y)) d = math.gcd(abs(x - y), n) if d != n: return d def factor(n): factors = {} def _factor(n): if n == 1: return if is_prime(n): factors[n] = factors.get(n, 0) + 1 return d = pollards_rho(n) _factor(d) _factor(n // d) _factor(n) return factors def generate_divisors(factors): divisors = [1] for p, exp in factors.items(): current_powers = [] for e in range(1, exp + 1): current_powers.append(p ** e) temp = [] for d in divisors: for power in current_powers: temp.append(d * power) divisors += temp divisors = list(set(divisors)) divisors.sort(reverse=True) return divisors def get_max_d(current, target): m = current - target if m < 1: return None if current <= m: return current factors = factor(current) if not factors: return None divisors = generate_divisors(factors) for d in divisors: if d <= m: return d return 1 def get_sequence(A, B): sequence = [] current = B while current > A: d = get_max_d(current, A) if d is None: return None sequence.append(d) current -= d sequence.reverse() return sequence def main(): input = sys.stdin.read().split() idx = 0 T = int(input[idx]) idx += 1 for _ in range(T): A = int(input[idx]) B = int(input[idx + 1]) idx += 2 sequence = get_sequence(A, B) K = len(sequence) print(K) if K > 0: print(' '.join(map(str, sequence))) else: print() if __name__ == '__main__': main()