結果

問題 No.368 LCM of K-products
ユーザー eitaho
提出日時 2016-04-29 23:05:27
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 290 ms / 2,000 ms
コード長 3,269 bytes
コンパイル時間 994 ms
コンパイル使用メモリ 116,828 KB
実行使用メモリ 33,472 KB
最終ジャッジ日時 2024-09-22 14:42:35
合計ジャッジ時間 4,919 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
other AC * 35
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using Enu = System.Linq.Enumerable;
public class Program
{
static readonly int Mod = (int)1e9 + 7;
static void Add(ref int a, int b) { if ((a += b) >= Mod) a -= Mod; }
public void Solve()
{
int N = Reader.Int(), K = Reader.Int();
var A = Reader.IntArray(N);
var factors = A.Select(a => Factorization(a)).ToArray();
var primes = new HashSet<int>();
foreach (var fac in factors)
foreach (int p in fac.Keys)
primes.Add(p);
long ans = 1;
foreach (int p in primes)
{
var num = new int[N];
for (int i = 0; i < N; i++)
num[i] = factors[i].ContainsKey(p) ? factors[i][p] : 0;
Array.Sort(num);
int sum = 0;
for (int i = N - 1; i >= N - K; i--)
sum += num[i];
for (int pow = 0; pow < sum; pow++)
ans = ans * p % Mod;
}
Console.WriteLine(ans);
}
static Dictionary<int, int> Factorization(int n)
{
var dic = new Dictionary<int, int>();
for (int i = 2; (long)i * i <= n; i++)
while (n % i == 0)
{
n /= i;
if (!dic.ContainsKey(i)) dic[i] = 1;
else dic[i]++;
}
if (n > 1) dic[n] = 1;
return dic;
}
}
class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
static TextReader reader = Console.In;
static readonly char[] separator = { ' ' };
static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
static string[] A = new string[0];
static int i;
static void Init() { A = new string[0]; }
public static void Set(TextReader r) { reader = r; Init(); }
public static void Set(string file) { reader = new StreamReader(file); Init(); }
public static bool HasNext() { return CheckNext(); }
public static string String() { return Next(); }
public static int Int() { return int.Parse(Next()); }
public static long Long() { return long.Parse(Next()); }
public static double Double() { return double.Parse(Next()); }
public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
public static int[] IntArray(int N) { return Range(N, Int); }
public static int[][] IntTable(int H) { return Range(H, IntLine); }
public static string[] StringArray(int N) { return Range(N, Next); }
public static string[][] StringTable(int N) { return Range(N, () => Split(Line())); }
public static string Line() { return reader.ReadLine().Trim(); }
static T[] Range<T>(int N, Func<T> f) { return Enu.Range(0, N).Select(i => f()).ToArray(); }
static string[] Split(string s) { return s.Split(separator, op); }
static string Next() { CheckNext(); return A[i++]; }
static bool CheckNext()
{
if (i < A.Length) return true;
string line = reader.ReadLine();
if (line == null) return false;
if (line == "") return CheckNext();
A = Split(line);
i = 0;
return true;
}
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0