結果
| 問題 | No.3038 シャッフルの再現 |
| コンテスト | |
| ユーザー |
lam6er
|
| 提出日時 | 2025-04-16 16:23:46 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 2,155 bytes |
| 記録 | |
| コンパイル時間 | 250 ms |
| コンパイル使用メモリ | 82,188 KB |
| 実行使用メモリ | 67,412 KB |
| 最終ジャッジ日時 | 2025-04-16 16:24:29 |
| 合計ジャッジ時間 | 2,214 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 factor(n):
factors = {}
while n % 2 == 0:
factors[2] = factors.get(2, 0) + 1
n = n // 2
i = 3
while i * i <= n:
while n % i == 0:
factors[i] = factors.get(i, 0) + 1
n = n // i
i += 2
if n > 1:
factors[n] = 1
return factors
def generate_divisors(factors):
divisors = [1]
for p, exp in factors.items():
temp = []
current_powers = [p**e for e in range(1, exp + 1)]
for d in divisors:
for power in current_powers:
temp.append(d * power)
divisors += temp
divisors = list(set(divisors))
divisors.sort()
return divisors
def fast_doubling(n, mod):
a, b = 0, 1
for bit in bin(n)[2:]:
c = a * (2 * b - a) % mod
d = (a * a + b * b) % mod
if bit == '1':
a, b = d, (c + d) % mod
else:
a, b = c, d
return a % mod, b % mod
def compute_pisano_prime(p):
if p == 2:
return 3
if p == 5:
return 20
legendre = pow(5, (p - 1) // 2, p)
if legendre == 1:
m = p - 1
else:
m = 2 * (p + 1)
factors = factor(m)
divisors = generate_divisors(factors)
for d in divisors:
f_d, f_next = fast_doubling(d, p)
if f_d == 0 and f_next == 1 % p:
return d
return m
def compute_pisano_prime_power(p, k):
if p == 2:
if k == 1:
return 3
else:
return 3 * (2 ** (k - 1))
elif p == 5:
return 20 * (5 ** (k - 1))
else:
period_p = compute_pisano_prime(p)
return period_p * (p ** (k - 1))
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_pisano_prime_power(p, k)
periods.append(period)
lcm = 1
for num in periods:
gcd = math.gcd(lcm, num)
lcm = (lcm // gcd) * num
print(lcm % MOD)
if __name__ == "__main__":
main()
lam6er