結果
| 問題 |
No.118 門松列(2)
|
| ユーザー |
mban
|
| 提出日時 | 2017-02-17 18:50:57 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,240 bytes |
| コンパイル時間 | 2,445 ms |
| コンパイル使用メモリ | 115,440 KB |
| 実行使用メモリ | 32,984 KB |
| 最終ジャッジ日時 | 2024-12-30 23:47:04 |
| 合計ジャッジ時間 | 3,842 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 4 WA * 22 |
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.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;
using System.IO;
class Program
{
static void Main(string[] args)
{
new Magatro().Solve();
}
}
public class Scanner
{
private StreamReader Sr;
private string[] S;
private int Index;
private const char Separator = ' ';
public Scanner(Stream source)
{
Index = 0;
S = new string[0];
Sr = new StreamReader(source);
}
private string[] Line()
{
return Sr.ReadLine().Split(Separator);
}
public string Next()
{
string result;
if (Index >= S.Length)
{
S = Line();
Index = 0;
}
result = S[Index];
Index++;
return result;
}
public int NextInt()
{
return int.Parse(Next());
}
public double NextDouble()
{
return double.Parse(Next());
}
public long NextLong()
{
return long.Parse(Next());
}
public decimal NextDecimal()
{
return decimal.Parse(Next());
}
public string[] StringArray(int index = 0)
{
Next();
Index = S.Length;
return S.Skip(index).ToArray();
}
public int[] IntArray(int index = 0)
{
return StringArray(index).Select(int.Parse).ToArray();
}
public long[] LongArray(int index = 0)
{
return StringArray(index).Select(long.Parse).ToArray();
}
public bool EndOfStream
{
get { return Sr.EndOfStream; }
}
}
public class Magatro
{
private Scanner Cin;
private const int Mod = 1000000007;
private void Scan()
{
Cin = new Scanner(Console.OpenStandardInput());
}
public void Solve()
{
Scan();
Anser(Cin.NextInt(), Cin.IntArray());
}
private void Anser(int n, int[] l)
{
var map = new Dictionary<int, int>();
int t;
foreach (int i in l)
{
if (map.TryGetValue(i, out t))
{
map[i]++;
}
else
{
map.Add(i, 1);
}
}
if (map.Count < 3)
{
Console.WriteLine(0);
return;
}
long bunsi = MyMath.Factorial(map.Count, Mod);
long bunbo = (6 * MyMath.Factorial(map.Count - 3, Mod)) % Mod;
long combination = (bunsi * MyMath.MyPower(bunbo, Mod - 2, Mod)) % Mod;
foreach (var p in map)
{
combination = (combination * p.Value) % Mod;
}
Console.WriteLine(combination);
}
}
static class MyMath
{
static public long MyPower(long a, long b, long mod)
{
long result = 1;
while (b > 0)
{
if (b % 2 == 1)
{
result *= a;
result %= mod;
}
a *= a;
a %= mod;
b /= 2;
}
return result;
}
static public long Factorial(long l, long mod)
{
if (l == 0) return 1;
return (Factorial(l - 1, mod) * l) % mod;
}
}
mban