結果
問題 | No.118 門松列(2) |
ユーザー | EmKjp |
提出日時 | 2015-05-10 22:28:25 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 66 ms / 5,000 ms |
コード長 | 3,329 bytes |
コンパイル時間 | 1,642 ms |
コンパイル使用メモリ | 119,064 KB |
実行使用メモリ | 33,592 KB |
最終ジャッジ日時 | 2024-10-09 06:59:00 |
合計ジャッジ時間 | 3,744 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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
19,840 KB |
testcase_01 | AC | 66 ms
28,288 KB |
testcase_02 | AC | 63 ms
27,776 KB |
testcase_03 | AC | 65 ms
27,776 KB |
testcase_04 | AC | 65 ms
27,904 KB |
testcase_05 | AC | 65 ms
32,092 KB |
testcase_06 | AC | 33 ms
23,096 KB |
testcase_07 | AC | 33 ms
21,300 KB |
testcase_08 | AC | 33 ms
25,052 KB |
testcase_09 | AC | 63 ms
32,172 KB |
testcase_10 | AC | 44 ms
26,596 KB |
testcase_11 | AC | 46 ms
26,864 KB |
testcase_12 | AC | 42 ms
26,076 KB |
testcase_13 | AC | 40 ms
26,204 KB |
testcase_14 | AC | 62 ms
32,008 KB |
testcase_15 | AC | 38 ms
25,688 KB |
testcase_16 | AC | 53 ms
30,028 KB |
testcase_17 | AC | 38 ms
26,196 KB |
testcase_18 | AC | 45 ms
26,616 KB |
testcase_19 | AC | 50 ms
27,436 KB |
testcase_20 | AC | 51 ms
27,376 KB |
testcase_21 | AC | 60 ms
33,592 KB |
testcase_22 | AC | 44 ms
26,860 KB |
testcase_23 | AC | 57 ms
33,272 KB |
testcase_24 | AC | 45 ms
26,488 KB |
testcase_25 | AC | 49 ms
27,864 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.IO; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Text; partial class Solver { long choose2(long x) { return x * (x - 1) / 2; } long choose3(long x) { return x * (x - 1) * (x - 2) / 6; } public void Run() { int mod = 1000000007; var N = ni(); var A = ni(N); long ans = 0; var histogram = A.GroupBy(x => x).ToDictionary(x => x.Key, x => x.Count()); ans = choose3(N) % mod; foreach (var p in histogram.Values) { if (p >= 2) { ans -= (choose2(p) * (N - p)) % mod; if (ans < 0) ans += mod; } if (p >= 3) { ans -= choose3(p) % mod; if (ans < 0) ans += mod; } } cout.WriteLine(ans); } } // PREWRITEN CODE BEGINS FROM HERE partial class Solver : Scanner { public static void Main(string[] args) { new Solver(Console.In, Console.Out).Run(); } TextReader cin; TextWriter cout; public Solver(TextReader reader, TextWriter writer) : base(reader) { this.cin = reader; this.cout = writer; } public Solver(string input, TextWriter writer) : this(new StringReader(input), writer) { } public int ni() { return NextInt(); } public int[] ni(int n) { return NextIntArray(n); } public long nl() { return NextLong(); } public long[] nl(int n) { return NextLongArray(n); } public string ns() { return Next(); } } public class Scanner { private TextReader Reader; private Queue<String> TokenQueue = new Queue<string>(); private CultureInfo ci = CultureInfo.InvariantCulture; public Scanner() : this(Console.In) { } public Scanner(TextReader reader) { this.Reader = reader; } public int NextInt() { return Int32.Parse(Next(), ci); } public long NextLong() { return Int64.Parse(Next(), ci); } public double NextDouble() { return double.Parse(Next(), ci); } public string[] NextArray(int size) { var array = new string[size]; for (int i = 0; i < size; i++) array[i] = Next(); return array; } public int[] NextIntArray(int size) { var array = new int[size]; for (int i = 0; i < size; i++) array[i] = NextInt(); return array; } public long[] NextLongArray(int size) { var array = new long[size]; for (int i = 0; i < size; i++) array[i] = NextLong(); return array; } public String Next() { if (TokenQueue.Count == 0) { if (!StockTokens()) throw new InvalidOperationException(); } return TokenQueue.Dequeue(); } public bool HasNext() { if (TokenQueue.Count > 0) return true; return StockTokens(); } private bool StockTokens() { while (true) { var line = Reader.ReadLine(); if (line == null) return false; var tokens = line.Trim().Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries); if (tokens.Length == 0) continue; foreach (var token in tokens) TokenQueue.Enqueue(token); return true; } } }