結果
問題 | No.118 門松列(2) |
ユーザー | mban |
提出日時 | 2017-02-18 02:39:39 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,399 bytes |
コンパイル時間 | 2,447 ms |
コンパイル使用メモリ | 107,648 KB |
実行使用メモリ | 28,672 KB |
最終ジャッジ日時 | 2024-06-09 13:42:04 |
合計ジャッジ時間 | 3,911 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | AC | 32 ms
18,944 KB |
testcase_07 | AC | 32 ms
19,200 KB |
testcase_08 | AC | 32 ms
19,200 KB |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
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 int N; private int[] A; private void Scan() { Cin = new Scanner(Console.OpenStandardInput()); N = Cin.NextInt(); A = Cin.IntArray(); } public void Solve() { Scan(); long result = Conbination(N, 3); var map = new Dictionary<int, int>(); int d; foreach (int i in A) { if (map.TryGetValue(i, out d)) { map[i]++; } else { map.Add(i, 1); } } foreach (var p in map) { if (p.Value >= 3) { result -= Conbination(p.Value, 3); } if (p.Value >= 2) { result -= Conbination(p.Value, 2) * (N - p.Value); } } Console.WriteLine(result); } private long Conbination(long n, long m) { long bunsi = MyMath.Factorial(n, Mod); long bunbo = (MyMath.Factorial(m, Mod) * MyMath.Factorial(n - m, Mod)) % Mod; return (bunsi * MyMath.MyPower(bunbo, Mod - 2, Mod))%Mod; } } 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; } }