結果
| 問題 |
No.3038 シャッフルの再現
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 提出日時 | 2025-06-12 18:49:52 |
| 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 | 165 ms |
| コンパイル使用メモリ | 82,304 KB |
| 実行使用メモリ | 68,060 KB |
| 最終ジャッジ日時 | 2025-06-12 18:49:56 |
| 合計ジャッジ時間 | 2,314 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 |
|---|---|
| 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()
gew1fw