結果
| 問題 | No.87 Advent Calendar Problem | 
| コンテスト | |
| ユーザー |  EmKjp | 
| 提出日時 | 2015-04-30 23:52:15 | 
| 言語 | C#(csc) (csc 3.9.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 23 ms / 5,000 ms | 
| コード長 | 3,399 bytes | 
| コンパイル時間 | 1,591 ms | 
| コンパイル使用メモリ | 106,752 KB | 
| 実行使用メモリ | 18,304 KB | 
| 最終ジャッジ日時 | 2024-07-05 17:16:29 | 
| 合計ジャッジ時間 | 2,660 ms | 
| ジャッジサーバーID (参考情報) | judge5 / judge2 | 
(要ログイン)
| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 24 | 
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 {
    public void Run() {
        var n = nl();
        var memo = new Dictionary<int, int>();
        long ans = 0;
        int cnt = 0;
        for (int year = 2015; year <= n; year++) {
            if (cnt == 400) break;
            if (new DateTime(year, 7, 23).DayOfWeek == DayOfWeek.Wednesday) {
                var key = year % 400;
                if (memo.ContainsKey(key)) {
                    cnt++;
                    int prev = memo[key];
                    if (prev == -1) continue;
                    long remain = n - year;
                    ans += remain / (year - prev) + 1;
                    memo[key] = -1;
                } else {
                    memo[key] = year;
                    ans++;
                }
            }
        }
        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;
        }
    }
}
            
            
            
        