結果
問題 | No.2795 Perfect Number |
ユーザー | shobonvip |
提出日時 | 2024-06-26 23:30:16 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 90 ms / 2,000 ms |
コード長 | 1,857 bytes |
コンパイル時間 | 377 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 76,288 KB |
最終ジャッジ日時 | 2024-06-28 20:50:51 |
合計ジャッジ時間 | 3,199 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 46 ms
54,528 KB |
testcase_01 | AC | 46 ms
54,400 KB |
testcase_02 | AC | 46 ms
54,144 KB |
testcase_03 | AC | 46 ms
54,400 KB |
testcase_04 | AC | 45 ms
54,144 KB |
testcase_05 | AC | 46 ms
54,784 KB |
testcase_06 | AC | 45 ms
54,400 KB |
testcase_07 | AC | 48 ms
54,656 KB |
testcase_08 | AC | 46 ms
54,400 KB |
testcase_09 | AC | 46 ms
54,400 KB |
testcase_10 | AC | 46 ms
54,144 KB |
testcase_11 | AC | 47 ms
54,144 KB |
testcase_12 | AC | 47 ms
54,400 KB |
testcase_13 | AC | 46 ms
54,912 KB |
testcase_14 | AC | 90 ms
76,160 KB |
testcase_15 | AC | 85 ms
76,160 KB |
testcase_16 | AC | 85 ms
76,288 KB |
testcase_17 | AC | 86 ms
76,160 KB |
testcase_18 | AC | 87 ms
76,288 KB |
testcase_19 | AC | 47 ms
54,272 KB |
testcase_20 | AC | 46 ms
54,656 KB |
testcase_21 | AC | 47 ms
54,144 KB |
testcase_22 | AC | 47 ms
54,272 KB |
testcase_23 | AC | 47 ms
54,272 KB |
testcase_24 | AC | 47 ms
54,656 KB |
testcase_25 | AC | 47 ms
54,400 KB |
testcase_26 | AC | 50 ms
54,656 KB |
testcase_27 | AC | 49 ms
54,912 KB |
testcase_28 | AC | 58 ms
62,464 KB |
testcase_29 | AC | 46 ms
54,144 KB |
testcase_30 | AC | 47 ms
54,528 KB |
testcase_31 | AC | 46 ms
54,144 KB |
testcase_32 | AC | 47 ms
54,272 KB |
testcase_33 | AC | 46 ms
54,528 KB |
testcase_34 | AC | 46 ms
54,400 KB |
testcase_35 | AC | 47 ms
54,912 KB |
testcase_36 | AC | 43 ms
54,400 KB |
testcase_37 | AC | 45 ms
54,528 KB |
ソースコード
# O(N^1/4 + Nの約数の個数×log N) # https://judge.yosupo.jp/submission/90854 import random def gcd(a, b): while a: a, b = b%a, a return b def isprime(n): if n == 2: return 1 if n == 1 or n%2 == 0: return 0 m = n-1; lsb = m & -m; s = lsb.bit_length()-1; d = m//lsb if n < 4759123141: test_numbers = [2, 7, 61] elif n < 341550071728321: test_numbers = [2, 3, 5, 7, 11, 13, 17] elif n < 3825123056546413051: test_numbers = [2, 3, 5, 7, 11, 13, 17, 19, 23] else: test_numbers = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37] for a in test_numbers: if a == n:continue x = pow(a,d,n); r = 0 if x == 1:continue while x != m: x = pow(x,2,n); r += 1 if x == 1 or r == s:return 0 return 1 def find_prime_factor(n): m = max(1,int(n**0.125)) while True: c = random.randrange(n); y = k = 0; g = q = r = 1 while g == 1: x = y; mr = 3*r//4 while k < mr: y = (pow(y,2,n)+c)%n; k += 1 while k < r and g == 1: ys = y for _ in range(min(m, r-k)): y = (pow(y,2,n)+c)%n; q = q*abs(x-y)%n g = gcd(q,n); k += m k = r; r <<= 1 if g == n: g = 1; y = ys while g == 1: y = (pow(y,2,n)+c)%n; g = gcd(abs(x-y),n) if g == n:continue if isprime(g):return g elif isprime(n//g):return n//g else:return find_prime_factor(g) def factorize(n): res = {} for p in range(2,1000): if p*p > n: break if n%p: continue s = 0 while n%p == 0: n //= p; s += 1 res[p] = s while not isprime(n) and n > 1: p = find_prime_factor(n); s = 0 while n%p == 0: n //= p; s += 1 res[p] = s if n > 1: res[n] = 1 return res n = int(input()) d = list(factorize(n).items()) ans = 0 def dfs(i, j, k, use): global ans if use: ans += i if len(d) <= j: return if d[j][1] >= k + 1: dfs(i * d[j][0], j, k + 1, True) dfs(i, j+1, 0, False) return dfs(1, 0, 0, 1) if ans == n * 2: print("Yes") else: print("No")