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 17:05:37 | 
| 言語 | C#(csc) (csc 3.9.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 109 ms / 2,000 ms | 
| コード長 | 2,935 bytes | 
| コンパイル時間 | 922 ms | 
| コンパイル使用メモリ | 108,160 KB | 
| 実行使用メモリ | 41,936 KB | 
| 最終ジャッジ日時 | 2024-11-10 00:35:39 | 
| 合計ジャッジ時間 | 2,333 ms | 
| ジャッジサーバーID (参考情報) | judge1 / 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;
    }
}
public class RollingHash
{
    ulong[] hash;
    ulong[] pow;
    public int Length => hash.Length - 1;
    const ulong @base = 131;
    const ulong mod = (1UL << 61) - 1;
    public RollingHash(string s)
    {
        hash = new ulong[s.Length + 1];
        pow = new ulong[s.Length + 1];
        pow[0] = 1;
        for (int i = 1; i < pow.Length; i++)
        {
            hash[i] = (Mul(hash[i - 1], @base) + s[i - 1]) % mod;
            pow[i] = Mul(pow[i - 1], @base)%mod;
        }
    }
    public ulong this[int i]
    {
        get
        {
            return hash[i];
        }
    }
    public ulong Hash(int l, int r)
    {
        var a = hash[r];
        var b = Mul(hash[l], pow[r - l])%mod;
        if (a < b) a += mod;
        return (a - b) % mod;
    }
    public static ulong ComputeHash(string s)
    {
        var h = 0UL;
        foreach (var i in s)
        {
            h = (Mul(h, @base) + i)%mod;
        }
        return h;
    }
    static ulong Mul(ulong a, ulong b)
    {
        const ulong MASK30 = (1UL << 30) - 1;
        const ulong MASK31 = (1UL << 31) - 1;
        var ah = a >> 31;
        var al = a & MASK31;
        var bh = b >> 31;
        var bl = b & MASK31;
        var m = al * bh + ah * bl;
        var mh = m >> 30;
        var ml = m & MASK30;
        return (ah * bh * 2 + mh + (ml << 31) + al * bl);
    }
}
            
            
            
        