結果
| 問題 |
No.741 AscNumber(Easy)
|
| コンテスト | |
| ユーザー |
AreTrash
|
| 提出日時 | 2018-10-11 03:47:26 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 53 ms / 2,000 ms |
| コード長 | 3,064 bytes |
| コンパイル時間 | 915 ms |
| コンパイル使用メモリ | 113,488 KB |
| 実行使用メモリ | 32,764 KB |
| 最終ジャッジ日時 | 2024-10-12 17:31:54 |
| 合計ジャッジ時間 | 3,563 ms |
|
ジャッジサーバーID (参考情報) |
judge / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 55 |
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;
namespace No741_Ex
{
public class Program
{
public static void Main(string[] args)
{
var N = int.Parse(Console.ReadLine());
var comb = new Combination(N + 10);
Console.WriteLine(comb.NCK(N + 9, 9));
}
}
public class Combination
{
readonly ModInt[] facts;
public Combination(int max)
{
facts = new ModInt[max + 1];
facts[0] = 1;
for (var i = 1; i <= max; i++) facts[i] = facts[i - 1] * i;
}
public ModInt Fact(int n)
{
return facts[n];
}
public ModInt NCK(int n, int k)
{
if (n < k) return 0;
return facts[n] / facts[k] / facts[n - k];
}
public ModInt NPK(int n, int k)
{
if (n < k) return 0;
return facts[n] / facts[n - k];
}
public ModInt NHK(int n, int k)
{
if (k == 0) return 1;
if (n == 0) return 0;
return facts[n + k - 1] / facts[k] / facts[n - 1];
}
}
public struct ModInt
{
public static int Mod = 1000000007;
readonly long value;
public int Value { get { return (int)value; } }
public ModInt Inverse { get { return GetInverse(); } }
public ModInt(long value)
{
value %= Mod;
this.value = value < 0 ? value + Mod : value;
}
ModInt GetInverse()
{
if (value == 0) throw new InvalidOperationException("value must NOT equal 0");
return Pow(Mod - 2);
}
public ModInt Square()
{
return this * this;
}
public ModInt Pow(long exp)
{
if (exp == 0) return 1;
if (exp % 2 == 0) return Pow(exp / 2).Square();
return this * Pow(exp - 1);
}
public static ModInt Parse(string str)
{
return long.Parse(str);
}
public static implicit operator ModInt(long value)
{
return new ModInt(value);
}
public static ModInt operator +(ModInt left, ModInt right)
{
return left.value + right.value;
}
public static ModInt operator -(ModInt left, ModInt right)
{
return left.value - right.value;
}
public static ModInt operator *(ModInt left, ModInt right)
{
return left.value * right.value;
}
public static ModInt operator /(ModInt left, ModInt right)
{
return left * right.Inverse;
}
public override bool Equals(object obj)
{
if (!(obj is ModInt)) return false;
return value == ((ModInt)obj).value;
}
public override int GetHashCode()
{
return value.GetHashCode();
}
public override string ToString()
{
return value.ToString();
}
}
}
AreTrash