結果
問題 |
No.577 Prime Powerful Numbers
|
ユーザー |
![]() |
提出日時 | 2025-06-12 16:26:52 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,954 bytes |
コンパイル時間 | 200 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 90,496 KB |
最終ジャッジ日時 | 2025-06-12 16:27:14 |
合計ジャッジ時間 | 6,568 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | -- * 1 |
other | TLE * 1 -- * 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 is_prime_power(x): if x == 1: return False if is_prime(x): return True spf = None if x % 2 == 0: spf = 2 else: i = 3 max_i = int(math.isqrt(x)) + 1 while i <= max_i: if x % i == 0: spf = i break i += 2 if spf is None: return True # x is a prime, but is_prime(x) should have handled it while x % spf == 0: x = x // spf return x == 1 def main(): input = sys.stdin.read().split() Q = int(input[0]) cases = list(map(int, input[1:Q+1])) for N in cases: found = False # Check for a in 2 to 60 for a in range(2, 61): max_p = int(N ** (1.0 / a)) + 1 p = 2 while p <= max_p: if is_prime(p): x = p ** a if x > N: break y = N - x if y < 2: p += 1 continue if is_prime_power(y): print("Yes") found = True break p += 1 if found: break if found: continue # Check for a=1, b >=2 for b in range(2, 61): max_q = int((N - 2) ** (1.0 / b)) + 1 q = 2 while q <= max_q: if is_prime(q): y = q ** b if y >= N: break x = N - y if is_prime(x): print("Yes") found = True break q += 1 if found: break if found: continue # Check for a=1, b=1 (sum of two primes) # Handle even numbers if N >= 4 and N % 2 == 0: print("Yes") found = True else: # Check if N is odd and N-2 is prime if N - 2 >= 2 and is_prime(N - 2): print("Yes") found = True if not found: print("No") if __name__ == "__main__": main()