結果

問題 No.588 空白と回文
ユーザー くれちーくれちー
提出日時 2017-11-03 23:19:16
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 27 ms / 2,000 ms
コード長 5,554 bytes
コンパイル時間 1,187 ms
コンパイル使用メモリ 118,220 KB
実行使用メモリ 17,664 KB
最終ジャッジ日時 2024-11-23 14:54:05
合計ジャッジ時間 2,669 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
other AC * 25
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.Diagnostics;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using static System.Math;
using static System.Linq.Enumerable;
using static Extentions;
using static System.Console;
public static class Program
{
public static void Solve()
{
var s = S + " ";
var ans1 = 0;
var ans2 = 0;
for (var i = 0; i < s.Length; i++)
{
var l = Min(i, s.Length - i - 1);
var cnt1 = 0;
for (var j = 1; j <= l; j++)
if (s[i - j] == s[i + j]) cnt1++;
ans1 = Max(ans1, cnt1);
var cnt2 = 0;
for (var j = 1; j <= l; j++)
if (s[i - j] == s[i + j - 1]) cnt2++;
ans2 = Max(ans2, cnt2);
}
var ans = Max(ans1 * 2 + 1, ans2 * 2);
WriteLine(ans);
}
#region Scanners
static Scanner _scanner;
static char C => _scanner.NextChar();
static string S => _scanner.NextString();
static int I => _scanner.NextInt();
static long L => _scanner.NextLong();
static BigInteger B => _scanner.NextBigInteger();
static double D => _scanner.NextDouble();
static decimal M => _scanner.NextDecimal();
#endregion
public static void Main()
{
Console.SetOut(new StreamWriter(Console.OpenStandardOutput())
{
NewLine = "\n",
#if DEBUG
AutoFlush = true,
#else
AutoFlush = false,
#endif
});
_scanner = new Scanner(Console.OpenStandardInput());
Solve();
Console.Out.Flush();
}
}
public static partial class Extentions
{
}
#region Library
// not tested
public class Scanner
{
private readonly Stream _stream;
private const int _bufferSize = 1024;
private readonly byte[] _buf = new byte[_bufferSize];
private int _len, _ptr;
public Scanner(Stream stream)
{
_stream = stream;
}
public byte ReadByte()
{
if (_ptr >= _len) { _len = _stream.Read(_buf, 0, 1024); _ptr = 0; }
return _buf[_ptr++];
}
public char ReadChar() => (char)ReadByte();
public string ReadLine()
{
var r = new StringBuilder();
if (_ptr == 0) r.Append(ReadChar());
for (; _ptr < _len; _ptr++) r.Append((char)_buf[_ptr]);
return r.ToString();
}
public char NextChar() => char.Parse(NextString());
public string NextString()
{
var r = new StringBuilder();
var b = ReadChar();
while (b != ' ' && b != '\n') { r.Append(b); b = ReadChar(); }
return r.ToString();
}
public int NextInt() => (int)NextLong();
public long NextLong()
{
var r = 0L;
var b = ReadByte();
var n = b == '-';
if (n) b = ReadByte();
while (b != ' ' && b != '\n') { r = r * 10 + b - '0'; b = ReadByte(); }
return n ? -r : r;
}
public BigInteger NextBigInteger()
{
var r = new BigInteger();
var b = ReadByte();
var n = b == '-';
if (n) b = ReadByte();
while (b != ' ' && b != '\n') { r = r * 10 + b - '0'; b = ReadByte(); }
return n ? -r : r;
}
public double NextDouble()
{
var i = 0L;
var b = ReadByte();
var n = b == '-';
if (n) b = ReadByte();
while (b != '.') { i = i * 10 + b - '0'; b = ReadByte(); }
var f = 0L;
var p = 0;
while (b != ' ' && b != '\n') { f = f * 10 + b - '0'; b = ReadByte(); p++; }
var r = i + f / Pow(10.0, p);
return n ? -r : r;
}
public decimal NextDecimal() => decimal.Parse(NextString());
public T Next<T>(Func<string, T> parser) => parser(NextString());
}
public static partial class Extentions
{
public static void Assert(bool condition)
{
if (!condition) throw new Exception();
}
public static string AsString(this IEnumerable<char> source) => new string(source.ToArray());
public static void ForEach<T>(this IEnumerable<T> source, Action<T> action)
{
foreach (var item in source) action(item);
}
public static void ForEach<T, _>(this IEnumerable<T> source, Func<T, _> func)
{
foreach (var item in source) func(item);
}
public static void ForEach<T>(this IEnumerable<T> source, Action<T, int> action)
{
var i = 0;
foreach (var item in source) action(item, i++);
}
public static void ForEach<T, _>(this IEnumerable<T> source, Func<T, int, _> func)
{
var i = 0;
foreach (var item in source) func(item, i++);
}
public static void Repeat(int count, Action action)
{
for (var i = 0; i < count; i++) action();
}
public static void Repeat(int count, Action<int> action)
{
for (var i = 0; i < count; i++) action(i);
}
public static IEnumerable<T> Repeat<T>(Func<T> func)
{
for (var i = 0; ; i++) yield return func();
}
public static IEnumerable<T> Repeat<T>(int count, Func<T> func)
{
for (var i = 0; i < count; i++) yield return func();
}
public static IEnumerable<T> Repeat<T>(Func<int, T> func)
{
for (var i = 0; ; i++) yield return func(i);
}
public static IEnumerable<T> Repeat<T>(int count, Func<int, T> func)
{
for (var i = 0; i < count; i++) yield return func(i);
}
public static void Swap<T>(ref T x, ref T y)
{
var tmp = x; x = y; y = tmp;
}
}
#endregion
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