結果
問題 | No.118 門松列(2) |
ユーザー | mban |
提出日時 | 2017-02-18 02:43:26 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 81 ms / 5,000 ms |
コード長 | 3,454 bytes |
コンパイル時間 | 1,117 ms |
コンパイル使用メモリ | 115,936 KB |
実行使用メモリ | 36,064 KB |
最終ジャッジ日時 | 2024-06-09 13:45:05 |
合計ジャッジ時間 | 3,739 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 | AC | 40 ms
28,204 KB |
testcase_01 | AC | 79 ms
31,876 KB |
testcase_02 | AC | 80 ms
33,808 KB |
testcase_03 | AC | 80 ms
35,964 KB |
testcase_04 | AC | 81 ms
36,064 KB |
testcase_05 | AC | 81 ms
34,048 KB |
testcase_06 | AC | 32 ms
27,572 KB |
testcase_07 | AC | 32 ms
23,604 KB |
testcase_08 | AC | 34 ms
27,440 KB |
testcase_09 | AC | 81 ms
35,640 KB |
testcase_10 | AC | 47 ms
27,444 KB |
testcase_11 | AC | 50 ms
27,216 KB |
testcase_12 | AC | 45 ms
26,424 KB |
testcase_13 | AC | 41 ms
26,172 KB |
testcase_14 | AC | 79 ms
33,764 KB |
testcase_15 | AC | 39 ms
25,988 KB |
testcase_16 | AC | 62 ms
30,588 KB |
testcase_17 | AC | 42 ms
26,540 KB |
testcase_18 | AC | 50 ms
27,560 KB |
testcase_19 | AC | 58 ms
28,728 KB |
testcase_20 | AC | 59 ms
29,108 KB |
testcase_21 | AC | 72 ms
32,552 KB |
testcase_22 | AC | 48 ms
27,576 KB |
testcase_23 | AC | 68 ms
32,432 KB |
testcase_24 | AC | 52 ms
27,436 KB |
testcase_25 | AC | 57 ms
28,088 KB |
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 long 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 +=(Mod- Conbination(p.Value, 3)); } if (p.Value >= 2) { result +=(Mod- Conbination(p.Value, 2) * (N - p.Value)); } result %= Mod; } Console.WriteLine((result+Mod*1000)%Mod); } 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; } }