結果
問題 |
No.300 平方数
|
ユーザー |
![]() |
提出日時 | 2017-07-22 02:27:53 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 43 ms / 1,000 ms |
コード長 | 2,959 bytes |
コンパイル時間 | 1,331 ms |
コンパイル使用メモリ | 118,768 KB |
実行使用メモリ | 20,992 KB |
最終ジャッジ日時 | 2024-10-09 04:43:36 |
合計ジャッジ時間 | 4,115 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 43 |
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.Collections; using System.Collections.Generic; using System.IO; using System.Linq; using System.Numerics; using System.Text; using static System.Console; using static System.Convert; using static System.Math; using static Extentions; class IO { int idx; string[] input; public IO(TextReader reader) { input = reader.ReadToEnd().Split(new[] { " ", Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries); } T Get<T>(Func<string, T> parser) => parser(input[idx++]); public string S => Get(s => s); public char C => Get(char.Parse); public int I => Get(int.Parse); public long L => Get(long.Parse); public double F => Get(double.Parse); public decimal D => Get(decimal.Parse); public BigInteger B => Get(BigInteger.Parse); T[] Gets<T>(int n, Func<string, T> parser) => input.Skip((idx += n) - n).Take(n).Select(parser).ToArray(); public string[] Ss(int n) => Gets(n, s => s); public char[] Cs(int n) => Gets(n, char.Parse); public int[] Is(int n) => Gets(n, int.Parse); public long[] Ls(int n) => Gets(n, long.Parse); public double[] Fs(int n) => Gets(n, double.Parse); public decimal[] Ds(int n) => Gets(n, decimal.Parse); public BigInteger[] Bs(int n) => Gets(n, BigInteger.Parse); public void Write<T>(params T[] xs) => WriteLine(string.Join(" ", xs)); public void Write(params object[] xs) => WriteLine(string.Join(" ", xs)); } static class Extentions { public static int[] Primes(int n) { if (n < 2) return Array.Empty<int>(); var flgs = new bool[n + 1]; for (var i = 3; i * i < n; i += 2) if (!flgs[i]) for (var j = i * i; j <= n; j += i) flgs[j] = true; var list = new List<int>() { 2 }; for (var i = 3; i <= n; i += 2) if (!flgs[i]) list.Add(i); return list.ToArray(); } public static long[] Factors(long x) { var list = new List<long>(); foreach (var p in Primes((int)Sqrt(x))) { while (true) { long r; var q = DivRem(x, p, out r); if (r > 0) break; list.Add(p); x = q; } } if (x > 1) list.Add(x); return list.ToArray(); } public static long Sqrt(long x) => (long)Ceiling(Math.Sqrt(x)); public static long Product(this IEnumerable<long> seq) => seq.Aggregate(1L, (x, y) => x * y); } static class Program { public static void Main() { #if !DEBUG SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false }); #endif Solve(new IO(In)); Out.Flush(); } static void Solve(IO io) { var y = Factors(io.L) .GroupBy(x => x) .Where(x => x.Count() % 2 != 0) .Select(x => x.First()) .Product(); io.Write(y); } }