結果
問題 | No.816 Beautiful tuples |
ユーザー | むらため |
提出日時 | 2019-05-17 20:37:23 |
言語 | Nim (2.0.2) |
結果 |
AC
|
実行時間 | 2 ms / 1,500 ms |
コード長 | 3,870 bytes |
コンパイル時間 | 3,764 ms |
コンパイル使用メモリ | 65,712 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-07-02 01:32:29 |
合計ジャッジ時間 | 4,541 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
(要ログイン)
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 | 1 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
ソースコード
import sequtils,math,intsets,algorithm proc getchar_unlocked():char {. importc:"getchar_unlocked",header: "<stdio.h>" ,discardable.} proc scan(): int = while true: let k = getchar_unlocked() if k < '0': return result = 10 * result + k.ord - '0'.ord # SFF で素因数分解 proc getFactors(n:int):seq[int]= const INF = int.high div 4 proc powerWhenTooBig(x,n:int,modulo:int = 0): int = proc mul(x,n,modulo:int):int = if n == 0: return 0 if n == 1: return x result = mul(x,n div 2,modulo) mod modulo result = (result * 2) mod modulo result = (result + x * (n mod 2 == 1).int) mod modulo if n == 0: return 1 if n == 1: return x let pow_2 = powerWhenTooBig(x,n div 2,modulo) odd = if n mod 2 == 1: x else: 1 if modulo > 0: const maybig = int.high.float.sqrt.int div 2 if pow_2 > maybig or odd > maybig: result = mul(pow_2,pow_2,modulo) result = mul(result,odd,modulo) else: result = (pow_2 * pow_2) mod modulo result = (result * odd) mod modulo else: return pow_2 * pow_2 * odd proc millerRabinIsPrime(n:int):bool = # O(log n) proc ctz(n:int):int{.importC: "__builtin_ctzll", noDecl .} # 01<0000> -> 4 proc power(x,n:int,modulo:int = 0): int = if n == 0: return 1 if n == 1: return x let pow_2 = power(x,n div 2,modulo) result = pow_2 * pow_2 * (if n mod 2 == 1: x else: 1) if modulo > 0: result = result mod modulo if n <= 1 : return false if n == 2 or n == 3 or n == 5: return true if n mod 2 == 0: return false let s = ctz(n - 1) d = (n - 1) div (1 shl s) var a_list = @[2, 7, 61] if n >= 4_759_123_141 and n < 341_550_071_728_321: a_list = @[2, 3, 5, 7, 11, 13, 17] if n in a_list : return true for a in a_list: if powerWhenTooBig(a,d,n) == 1 : continue let notPrime = toSeq(0..<s).allIt(powerWhenTooBig(a,d*(1 shl it),n) != n-1) if notPrime : return false return true proc squareFormFactor(n:int):int = if millerRabinIsPrime(n) : return n proc check(k:int):int = proc √(x:int):int = x.float.sqrt.int if n <= 1 : return n if n mod 2 == 0 : return 2 if √(n) * √(n) == n : return √(n) let ncb = n.float.cbrt.int if ncb * ncb * ncb == n : return ncb var P,Q = newSeq[int]() block: P &= √(k * n) Q &= 1 Q &= k * n - P[0]*P[0] while √(Q[^1]) * √(Q[^1]) != Q[^1]: let b = (√(k * n) + P[^1] ) div Q[^1] P &= b * Q[^1] - P[^1] Q &= Q[^2] + b * (P[^2] - P[^1]) block: if Q[^1] == 0 : return check(k + 1) let b = (√(k * n) - P[^1] ) div Q[^1] P0 = b * √(Q[^1]) + P[^1] Q0 = √(Q[^1]) Q1 = (k*n - P0*P0) div Q0 (P,Q) = (@[P0], @[ Q0, Q1 ]) while true: let b = (√(k * n) + P[^1] ) div Q[^1] P &= b * Q[^1] - P[^1] Q &= Q[^2] + b * (P[^2] - P[^1]) if P[^1] == P[^2] or Q[^1] == Q[^2]: break let f = gcd(n,P[^1]) if f != 1 and f != n : return f else: return check(k+1) return check(1) if n == 1 : return @[1] if n == 0 : return @[0] result = @[] var m = n while true: let p = m.squareFormFactor() if p.millerRabinIsPrime(): result &= p else: result &= p.getFactors() if p == m: return m = m div p # 因数を全て列挙 proc getAllFactors(n:int):seq[int] = let factors = n.getFactors() var xs = initIntSet() xs.incl 1 for f in factors: for x in toSeq(xs.items): xs.incl(x * f) return toSeq(xs.items).sorted(cmp) let a = scan() let b = scan() let C = getAllFactors(a+b) for c in C: if c == a or c == b : continue if (c + b) mod a != 0 : continue if (c + a) mod b != 0 : continue echo c quit 0 echo -1