結果
| 問題 |
No.577 Prime Powerful Numbers
|
| コンテスト | |
| ユーザー |
gew1fw
|
| 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()
gew1fw