結果
| 問題 | No.430 文字列検索 |
| コンテスト | |
| ユーザー |
iwkjosec
|
| 提出日時 | 2019-10-04 12:14:37 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 94 ms / 2,000 ms |
| コード長 | 3,891 bytes |
| 記録 | |
| コンパイル時間 | 794 ms |
| コンパイル使用メモリ | 116,076 KB |
| 実行使用メモリ | 42,988 KB |
| 最終ジャッジ日時 | 2024-11-10 00:35:32 |
| 合計ジャッジ時間 | 2,212 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 14 |
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.Generic;
using System.Linq;
using static System.Console;
using static System.Math;
class Program
{
static void Main()
{
var s = ReadLine();
var m = int.Parse(ReadLine());
var rh = new RollingHash(s);
var d = new Map<ulong, int>();
for (int i = 1; i < 11; i++)
{
for (int j = 0; j <= s.Length - i; j++)
{
d[rh.Hash(j, j + i)]++;
}
}
var a = 0;
for (int i = 0; i < m; i++)
{
var c = ReadLine();
var h = RollingHash.ComputeHash(c);
a += d[h];
}
WriteLine(a);
}
}
public class Map<TKey, TValue> : Dictionary<TKey, TValue>
{
public Map() { }
public Map(int capacity) : base(capacity) { }
public Map(IEqualityComparer<TKey> comparer) : base(comparer) { }
public Map(int capacity, IEqualityComparer<TKey> comparer) : base(capacity, comparer) { }
public Map(IDictionary<TKey, TValue> dictionary) : base(dictionary) { }
public Map(IDictionary<TKey, TValue> dictionary, IEqualityComparer<TKey> comparer) : base(dictionary, comparer) { }
public Map(IEnumerable<KeyValuePair<TKey, TValue>> collection) : base(collection) { }
public Map(IEnumerable<KeyValuePair<TKey, TValue>> collection, IEqualityComparer<TKey> comparer) : base(collection, comparer) { }
public new TValue this[TKey key]
{
get => TryGetValue(key, out var value) ? value : default;
set => base[key] = value;
}
}
class RollingHash
{
const ulong MASK30 = (1UL << 30) - 1;
const ulong MASK31 = (1UL << 31) - 1;
const ulong MOD = (1UL << 61) - 1;
const ulong POSITIVIZER = MOD * ((1UL << 3) - 1);
static uint Base;
static ulong[] powMemo = new ulong[50000 + 1];
static RollingHash()
{
Base = (uint)new Random().Next(129, int.MaxValue);
powMemo[0] = 1;
for (int i = 1; i < powMemo.Length; i++)
powMemo[i] = CalcMod(Mul(powMemo[i - 1], Base));
}
ulong[] hash;
public RollingHash(string s)
{
hash = new ulong[s.Length + 1];
for (int i = 0; i < s.Length; i++)
hash[i + 1] = CalcMod(Mul(hash[i], Base) + s[i]);
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public ulong Hash(int begin, int end)
{
return CalcMod(hash[end] + POSITIVIZER - Mul(hash[begin], powMemo[end - begin]));
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static ulong ComputeHash(string s)
{
var h = 0UL;
for (int i = 0; i < s.Length; i++)
{
h = CalcMod(Mul(h, Base) + s[i]);
}
return h;
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
private static ulong Mul(ulong l, ulong r)
{
var lu = l >> 31;
var ld = l & MASK31;
var ru = r >> 31;
var rd = r & MASK31;
var middleBit = ld * ru + lu * rd;
return ((lu * ru) << 1) + ld * rd + ((middleBit & MASK30) << 31) + (middleBit >> 30);
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
private static ulong Mul(ulong l, uint r)
{
var lu = l >> 31;
var rd = r & MASK31;
var middleBit = lu * rd;
return (l & MASK31) * rd + ((middleBit & MASK30) << 31) + (middleBit >> 30);
}
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
private static ulong CalcMod(ulong val)
{
val = (val & MOD) + (val >> 61);
if (val > MOD) val -= MOD;
return val;
}
}
iwkjosec