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 | 2019-10-03 15:43:19 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 81 ms / 2,000 ms |
| コード長 | 3,683 bytes |
| コンパイル時間 | 1,035 ms |
| コンパイル使用メモリ | 117,268 KB |
| 実行使用メモリ | 32,128 KB |
| 最終ジャッジ日時 | 2024-11-10 00:35:27 |
| 合計ジャッジ時間 | 2,364 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / 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().Select(x => x - 'A' + 1).ToArray();
var m = int.Parse(ReadLine());
var rh = new RollingHash(s);
var d = new Map<ulong, int>(s.Length * 10);
for (int i = 1; i < 11; i++)
{
for (int j = 0; j <= s.Length - i; j++)
{
d[rh.Hash(j, j + i)]++;
}
}
var a = 0L;
for (int i = 0; i < m; i++)
{
var c = ReadLine().Select(x => x - 'A' + 1).ToArray();
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;
const ulong @base = 27;
const ulong mod = (1UL << 61) - 1;
const ulong MASK30 = (1UL << 30) - 1;
const ulong MASK31 = (1UL << 31) - 1;
const ulong MOD = (1UL << 61) - 1;
static ulong Mul(ulong a, ulong b)
{
var au = a >> 31;
var ad = a & MASK31;
var bu = b >> 31;
var bd = b & MASK31;
var mid = ad * bu + au * bd;
var midu = mid >> 30;
var midd = (mid & MASK30);
return CalcMod(au * bu * 2 + midu + (midd << 31) + ad * bd);
}
static ulong CalcMod(ulong val)
{
val = (val & MOD) + (val >> 61);
if (val > MOD) val -= MOD;
return val;
}
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++)
{
pow[i] = Mul(pow[i - 1], @base);
hash[i] = (Mul(hash[i - 1], @base % mod) + s[i - 1]) % mod;
}
}
public RollingHash(int[] s)
{
hash = new ulong[s.Length + 1];
pow = new ulong[s.Length + 1];
pow[0] = 1;
for (int i = 1; i < pow.Length; i++)
{
pow[i] = Mul(pow[i - 1], @base);
hash[i] = (Mul(hash[i - 1], @base) + (ulong)s[i - 1]) % mod;
}
}
public static ulong ComputeHash(string s)
{
var h = 0UL;
for (int i = 0; i < s.Length; i++)
{
h = (h + s[i]) % mod;
if (i != s.Length - 1) h = Mul(h, @base);
}
return h;
}
public static ulong ComputeHash(int[] s)
{
var h = 0UL;
for (int i = 0; i < s.Length; i++)
{
h = (h + (ulong)s[i]) % mod;
if (i != s.Length - 1) h = Mul(h, @base);
}
return h;
}
public ulong Hash(int l, int r)
{
var h = 0UL;
h = (hash[r] - Mul(hash[l], pow[r - l])) % mod;
return h;
}
}
iwkjosec