結果
問題 |
No.3038 シャッフルの再現
|
ユーザー |
![]() |
提出日時 | 2025-06-12 13:46:54 |
言語 | PyPy3 (7.3.15) |
結果 |
RE
|
実行時間 | - |
コード長 | 2,207 bytes |
コンパイル時間 | 246 ms |
コンパイル使用メモリ | 82,168 KB |
実行使用メモリ | 67,612 KB |
最終ジャッジ日時 | 2025-06-12 13:47:04 |
合計ジャッジ時間 | 2,706 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | RE * 1 |
other | RE * 21 |
ソースコード
import sys import math MOD = 10**9 + 7 def factorize(n): factors = {} while n % 2 == 0: factors[2] = factors.get(2, 0) + 1 n = n // 2 i = 3 max_i = math.isqrt(n) + 1 while i <= max_i and n > 1: while n % i == 0: factors[i] = factors.get(i, 0) + 1 n = n // i max_i = math.isqrt(n) + 1 i += 2 if n > 1: factors[n] = 1 return factors def generate_divisors(factors): divisors = [1] for p in factors: exponents = [] current = 1 for _ in range(factors[p]): current *= p exponents.append(current) new_divisors = [] for d in divisors: for exp in exponents: new_divisors.append(d * exp) divisors += new_divisors divisors = list(sorted(set(divisors))) return divisors def fib(n, mod): if n == 0: return (0, 1) a, b = fib(n >> 1, mod) c = (a * ((2 * b - a) % mod)) % mod d = (a * a + b * b) % mod if n & 1: return (d, (c + d) % mod) else: return (c, d) def compute_pisano_period(p): if p == 2: return 3 if p == 5: return 20 mod5 = p % 5 if mod5 in (1, 4): n = p - 1 else: n = 2 * (p + 1) factors = factorize(n) divisors = generate_divisors(factors) for d in divisors: f_d, f_d_plus_1 = fib(d, p) if f_d == 0 and f_d_plus_1 == 1: return d return n def compute_period(p, k): if p == 2: return 3 * (2 ** (k - 1)) elif p == 5: return 20 * (5 ** (k - 1)) else: base = compute_pisano_period(p) return base * (p ** (k - 1)) def lcm(a, b): return a * b // math.gcd(a, b) def main(): input = sys.stdin.read().split() idx = 0 N = int(input[idx]) idx += 1 periods = [] for _ in range(N): p = int(input[idx]) k = int(input[idx + 1]) idx += 2 period = compute_period(p, k) periods.append(period) current_lcm = 1 for p in periods: current_lcm = lcm(current_lcm, p) print(current_lcm % MOD) if __name__ == '__main__': main()