結果
問題 | No.308 素数は通れません |
ユーザー | AreTrash |
提出日時 | 2019-01-24 00:55:06 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 43 ms / 1,000 ms |
コード長 | 5,311 bytes |
コンパイル時間 | 1,110 ms |
コンパイル使用メモリ | 114,476 KB |
実行使用メモリ | 19,584 KB |
最終ジャッジ日時 | 2024-09-16 04:33:22 |
合計ジャッジ時間 | 7,985 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | 35 ms
19,072 KB |
testcase_01 | AC | 35 ms
19,072 KB |
testcase_02 | AC | 35 ms
19,328 KB |
testcase_03 | AC | 35 ms
19,200 KB |
testcase_04 | AC | 36 ms
19,200 KB |
testcase_05 | AC | 36 ms
19,328 KB |
testcase_06 | AC | 36 ms
19,328 KB |
testcase_07 | AC | 36 ms
19,200 KB |
testcase_08 | AC | 36 ms
19,200 KB |
testcase_09 | AC | 36 ms
19,200 KB |
testcase_10 | AC | 35 ms
19,200 KB |
testcase_11 | AC | 36 ms
19,456 KB |
testcase_12 | AC | 36 ms
19,456 KB |
testcase_13 | AC | 36 ms
19,456 KB |
testcase_14 | AC | 36 ms
19,456 KB |
testcase_15 | AC | 35 ms
19,328 KB |
testcase_16 | AC | 36 ms
19,200 KB |
testcase_17 | AC | 36 ms
19,328 KB |
testcase_18 | AC | 36 ms
19,328 KB |
testcase_19 | AC | 36 ms
19,456 KB |
testcase_20 | AC | 36 ms
19,456 KB |
testcase_21 | AC | 35 ms
19,328 KB |
testcase_22 | AC | 36 ms
19,456 KB |
testcase_23 | AC | 36 ms
19,328 KB |
testcase_24 | AC | 36 ms
19,072 KB |
testcase_25 | AC | 36 ms
19,456 KB |
testcase_26 | AC | 35 ms
19,200 KB |
testcase_27 | AC | 37 ms
19,328 KB |
testcase_28 | AC | 40 ms
19,200 KB |
testcase_29 | AC | 40 ms
19,200 KB |
testcase_30 | AC | 40 ms
19,456 KB |
testcase_31 | AC | 40 ms
19,456 KB |
testcase_32 | AC | 40 ms
19,584 KB |
testcase_33 | AC | 40 ms
19,328 KB |
testcase_34 | AC | 39 ms
19,456 KB |
testcase_35 | AC | 40 ms
19,328 KB |
testcase_36 | AC | 32 ms
18,432 KB |
testcase_37 | AC | 31 ms
18,432 KB |
testcase_38 | AC | 32 ms
18,304 KB |
testcase_39 | AC | 31 ms
18,432 KB |
testcase_40 | AC | 32 ms
18,432 KB |
testcase_41 | AC | 31 ms
18,432 KB |
testcase_42 | AC | 31 ms
18,432 KB |
testcase_43 | AC | 31 ms
18,304 KB |
testcase_44 | AC | 31 ms
18,432 KB |
testcase_45 | AC | 31 ms
18,432 KB |
testcase_46 | AC | 31 ms
18,304 KB |
testcase_47 | AC | 32 ms
18,432 KB |
testcase_48 | AC | 32 ms
18,304 KB |
testcase_49 | AC | 31 ms
18,176 KB |
testcase_50 | AC | 31 ms
18,432 KB |
testcase_51 | AC | 31 ms
18,432 KB |
testcase_52 | AC | 31 ms
18,304 KB |
testcase_53 | AC | 31 ms
18,304 KB |
testcase_54 | AC | 31 ms
18,304 KB |
testcase_55 | AC | 31 ms
18,304 KB |
testcase_56 | AC | 36 ms
18,944 KB |
testcase_57 | AC | 31 ms
18,176 KB |
testcase_58 | AC | 31 ms
18,304 KB |
testcase_59 | AC | 32 ms
18,432 KB |
testcase_60 | AC | 33 ms
18,304 KB |
testcase_61 | AC | 33 ms
18,304 KB |
testcase_62 | AC | 32 ms
18,560 KB |
testcase_63 | AC | 36 ms
19,072 KB |
testcase_64 | AC | 32 ms
18,432 KB |
testcase_65 | AC | 32 ms
18,176 KB |
testcase_66 | AC | 33 ms
18,432 KB |
testcase_67 | AC | 32 ms
18,432 KB |
testcase_68 | AC | 32 ms
18,176 KB |
testcase_69 | AC | 32 ms
18,432 KB |
testcase_70 | AC | 32 ms
18,304 KB |
testcase_71 | AC | 32 ms
18,176 KB |
testcase_72 | AC | 32 ms
18,304 KB |
testcase_73 | AC | 32 ms
18,176 KB |
testcase_74 | AC | 32 ms
18,304 KB |
testcase_75 | AC | 32 ms
18,432 KB |
testcase_76 | AC | 39 ms
19,072 KB |
testcase_77 | AC | 32 ms
18,304 KB |
testcase_78 | AC | 32 ms
18,432 KB |
testcase_79 | AC | 32 ms
18,432 KB |
testcase_80 | AC | 39 ms
19,200 KB |
testcase_81 | AC | 43 ms
19,200 KB |
testcase_82 | AC | 33 ms
18,432 KB |
testcase_83 | AC | 33 ms
18,176 KB |
testcase_84 | AC | 41 ms
19,200 KB |
testcase_85 | AC | 31 ms
18,432 KB |
testcase_86 | AC | 41 ms
19,200 KB |
testcase_87 | AC | 41 ms
19,200 KB |
testcase_88 | AC | 32 ms
18,176 KB |
testcase_89 | AC | 31 ms
18,176 KB |
testcase_90 | AC | 42 ms
19,200 KB |
testcase_91 | AC | 33 ms
18,304 KB |
testcase_92 | AC | 32 ms
18,432 KB |
testcase_93 | AC | 33 ms
18,304 KB |
testcase_94 | AC | 32 ms
18,176 KB |
testcase_95 | AC | 33 ms
18,176 KB |
testcase_96 | AC | 36 ms
19,200 KB |
testcase_97 | AC | 32 ms
18,304 KB |
testcase_98 | AC | 32 ms
18,432 KB |
testcase_99 | AC | 42 ms
19,328 KB |
testcase_100 | AC | 42 ms
19,072 KB |
testcase_101 | AC | 42 ms
19,200 KB |
testcase_102 | AC | 31 ms
18,432 KB |
testcase_103 | AC | 32 ms
18,560 KB |
testcase_104 | AC | 32 ms
18,432 KB |
testcase_105 | AC | 32 ms
18,176 KB |
testcase_106 | AC | 37 ms
19,072 KB |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System; using System.IO; using System.Collections.Generic; using System.Linq; using System.Numerics; namespace No308 { public class Program { void Solve(StreamScanner ss, StreamWriter sw) { //--------------------------------- var N = ss.Next(BigInteger.Parse); if (N < 100) { sw.WriteLine(BruteForce((int)N)); return; } if (N % 8 != 1) { sw.WriteLine(8); return; } sw.WriteLine(MillerRabin.IsPrime(N - 8) ? 14 : 8); //--------------------------------- } int BruteForce(int n) { for (var w = 1; w <= n; w++) { var uf = new UnionFind(n + 1); for (var i = 1; i <= n; i++) { if (MillerRabin.IsPrime(i)) continue; if (i + 1 <= n && i % w != 0 && !MillerRabin.IsPrime(i + 1)) uf.Unite(i, i + 1); if (i + w <= n && !MillerRabin.IsPrime(i + w)) uf.Unite(i, i + w); } if (uf.IsSameSet(1, n)) return w; } return -1; } static void Main() { var ss = new StreamScanner(new StreamReader(Console.OpenStandardInput())); var sw = new StreamWriter(Console.OpenStandardOutput()) {AutoFlush = false}; new Program().Solve(ss, sw); sw.Flush(); } } public static class MillerRabin { const int RandomTestCount = 30; static readonly BigInteger[] BasePrimes = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41,}; static readonly BigInteger[] WitnessRanges = { 2047, 1373653, 25326001, 118670087467, //3215031751が例外 2152302898747, 3474749660383, 341550071728321, 341550071728321, 3825123056546413051, 3825123056546413051, 3825123056546413051, BigInteger.Parse("318665857834031151167461"), BigInteger.Parse("3317044064679887385961981"), }; public static bool IsPrime(BigInteger n) { if (n < 2 || n == 3215031751) return false; if (n < 42) return BasePrimes.Contains(n); if (BasePrimes.Any(p => n % p == 0)) return false; var d = n - 1; while ((d & 1) == 0) d >>= 1; for (var i = 0; i < BasePrimes.Length; i++) { if (!MillerRabinTest(n, d, BasePrimes[i])) return false; if (n < WitnessRanges[i]) return true; } //n > 3.3e24 var random = new Random(); for (var i = 0; i < RandomTestCount; i++) { if (!MillerRabinTest(n, d, random.Next(1, int.MaxValue))) return false; } return true; } static bool MillerRabinTest(BigInteger n, BigInteger d, BigInteger a) { a = BigInteger.ModPow(a, d, n); if (a == 1 || a == n - 1) return true; while ((d <<= 1) < n - 1) { a = a * a % n; if (a == n - 1) return true; } return false; } } public class UnionFind { readonly int[] p; public UnionFind(int n) { p = new int[n]; for (var i = 0; i < n; i++) p[i] = -1; } public int Root(int x) { return p[x] < 0 ? x : (p[x] = Root(p[x])); } public bool IsSameSet(int x, int y) { return Root(x) == Root(y); } public bool Unite(int x, int y) { x = Root(x); y = Root(y); if (x == y) return false; if (p[x] > p[y]) { var t = x; x = y; y = t; } p[x] += p[y]; p[y] = x; return true; } public int Size(int x) { return -p[Root(x)]; } } public class StreamScanner { static readonly char[] Sep = {' '}; readonly Queue<string> buffer = new Queue<string>(); readonly TextReader textReader; public StreamScanner(TextReader textReader) { this.textReader = textReader; } public T Next<T>(Func<string, T> parser) { if (buffer.Count != 0) return parser(buffer.Dequeue()); var nextStrings = textReader.ReadLine().Split(Sep, StringSplitOptions.RemoveEmptyEntries); foreach (var nextString in nextStrings) buffer.Enqueue(nextString); return Next(parser); } public T[] Next<T>(Func<string, T> parser, int x) { var ret = new T[x]; for (var i = 0; i < x; ++i) ret[i] = Next(parser); return ret; } public T[][] Next<T>(Func<string, T> parser, int x, int y) { var ret = new T[y][]; for (var i = 0; i < y; ++i) ret[i] = Next(parser, x); return ret; } } }