結果

問題 No.723 2つの数の和
ユーザー sekiya9311
提出日時 2018-08-03 22:44:16
言語 C#(csc)
(csc 3.9.0)
結果
RE  
実行時間 -
コード長 7,620 bytes
コンパイル時間 1,099 ms
コンパイル使用メモリ 118,696 KB
実行使用メモリ 35,680 KB
最終ジャッジ日時 2024-09-19 17:32:34
合計ジャッジ時間 2,957 ms
ジャッジサーバーID
(参考情報)
judge2 / judge4
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 13 RE * 9
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ProgrammingContest
{
class Writer : IDisposable
{
private readonly System.IO.TextWriter writer;
private StringBuilder sb;
private readonly bool isReactive;
public Writer(string path)
: this(new System.IO.StreamWriter(path))
{
}
public Writer(bool isReactive)
: this(null, isReactive)
{
}
public Writer(System.IO.TextWriter writer = null,
bool isReactive = false)
{
this.writer = (writer ?? Console.Out);
this.isReactive = isReactive;
if (!this.isReactive)
{
this.sb = new StringBuilder();
}
}
public void Dispose()
{
if (!this.isReactive)
{
this.writer.Write(sb.ToString());
}
if (!this.writer.Equals(Console.Out))
{
this.writer.Dispose();
}
}
public void Write(object val)
{
if (this.isReactive)
{
this.writer.Write(val.ToString());
this.writer.Flush();
}
else
{
this.sb.Append(val.ToString());
}
}
public void Write(string format, params object[] vals)
{
if (this.isReactive)
{
this.writer.Write(format, vals);
this.writer.Flush();
}
else
{
this.sb.AppendFormat(format, vals);
}
}
public void WriteLine(object val = null)
{
this.Write((val ?? string.Empty).ToString() + Environment.NewLine);
}
public void WriteLine(int val)
{
this.WriteLine(val.ToString());
}
public void WriteLine(long val)
{
this.WriteLine(val.ToString());
}
public void WriteLine(string val)
{
this.WriteLine((object)val);
}
public void WriteLine(string format, params object[] vals)
{
this.Write(format + Environment.NewLine, vals);
}
}
class Scanner : IDisposable
{
private readonly Queue<string> buffer;
private readonly char[] sep;
private readonly System.IO.TextReader reader;
public Scanner(string path, char[] sep = null)
: this(new System.IO.StreamReader(path), sep)
{
}
public Scanner(System.IO.TextReader reader = null,
char[] sep = null)
{
this.buffer = new Queue<string>();
this.sep = (sep ?? new char[] { ' ' });
this.reader = (reader ?? Console.In);
}
private void CheckBuffer()
{
if (this.buffer.Count == 0 && this.reader.Peek() != -1)
{
string str = string.Empty;
for (; string.IsNullOrEmpty(str) || string.IsNullOrWhiteSpace(str);
str = this.reader.ReadLine()) ;
str.Split(this.sep).Where(el => !(string.IsNullOrEmpty(el) || string.IsNullOrWhiteSpace(el)))
.ToList().ForEach(el => this.buffer.Enqueue(el));
}
}
public void Dispose()
{
if (!this.reader.Equals(Console.In))
{
this.reader.Dispose();
}
}
public string Next
{
get
{
this.CheckBuffer();
return this.buffer.Dequeue();
}
}
public string[] GetStringArray(int N)
{
return Enumerable.Range(0, N)
.Select(e => this.Next)
.ToArray();
}
public int NextInt
{
get
{
return int.Parse(this.Next);
}
}
public int[] GetIntArray(int N)
{
return Enumerable.Range(0, N)
.Select(e => this.NextInt)
.ToArray();
}
public double NextDouble
{
get
{
return double.Parse(this.Next);
}
}
public double[] GetdoubleArray(int N)
{
return Enumerable.Range(0, N)
.Select(e => this.NextDouble)
.ToArray();
}
public long NextLong
{
get
{
return long.Parse(this.Next);
}
}
public long[] GetLongArray(int N)
{
return Enumerable.Range(0, N)
.Select(e => this.NextLong)
.ToArray();
}
public bool IsEnd
{
get
{
this.CheckBuffer();
return this.buffer.Count == 0;
}
}
}
class MainClass : IDisposable
{
Scanner sc;
Writer wr;
const string backPath = "..";
private readonly char dirSep = System.IO.Path.DirectorySeparatorChar;
private readonly string inFilePath = string.Empty;
private readonly string outFilePath = string.Empty;
public MainClass()
{
this.inFilePath = MainClass.backPath
+ this.dirSep
+ MainClass.backPath
+ this.dirSep
+ "in.txt";
this.outFilePath = MainClass.backPath
+ this.dirSep
+ MainClass.backPath
+ this.dirSep
+ "out.txt";
this.wr = new Writer(this.IsReactive);
//this.wr = new Writer(this.outFilePath);
#if DEBUG
if (!this.IsReactive)
{
this.sc = new Scanner(this.inFilePath);
}
else
{
this.sc = new Scanner();
}
#else
this.sc = new Scanner();
#endif
}
static void Main(string[] args)
{
using (var mainClass = new MainClass())
{
mainClass.Solve();
}
}
public void Dispose()
{
this.sc?.Dispose();
this.sc = null;
this.wr?.Dispose();
this.wr = null;
#if DEBUG
Console.WriteLine("press any key to continue...");
Console.ReadKey();
#endif
}
void MakeTestCase()
{
var rand = new Random();
this.wr?.Dispose();
this.wr = new Writer(inFilePath);
}
void Solve()
{
int N = sc.NextInt;
long X = sc.NextLong;
var a = sc.GetIntArray(N);
var cnt = new int[(int)1e5 + 10];
foreach (var e in a)
{
cnt[e]++;
}
long ans = 0;
for (int i = 0; i < cnt.Length; i++)
{
if (X - i >= 0 && cnt[i] > 0)
{
ans += 1L * cnt[i] * cnt[X - i];
}
}
wr.WriteLine(ans);
}
private bool IsReactive { get; } = false; // TODO: reactive check !!
}
}
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