結果
| 問題 |
No.209 Longest Mountain Subsequence
|
| コンテスト | |
| ユーザー |
EmKjp
|
| 提出日時 | 2015-05-15 23:09:55 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 150 ms / 2,000 ms |
| コード長 | 4,592 bytes |
| コンパイル時間 | 763 ms |
| コンパイル使用メモリ | 107,392 KB |
| 実行使用メモリ | 35,456 KB |
| 最終ジャッジ日時 | 2024-07-06 04:14:05 |
| 合計ジャッジ時間 | 1,789 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 6 |
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.IO;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
partial class Solver {
int?[,] memo1 = new int?[111, 111];
int dfs1(int[] A, int pos, int pre) {
if (!memo1[pos, pre].HasValue) {
int d = Math.Abs(A[pre] - A[pos]);
int maxLeftLength = 0;
for (int i = 0; i < pos; i++) {
if (A[i] < A[pos] && Math.Abs(A[pos] - A[i]) < d) {
maxLeftLength = Math.Max(maxLeftLength, dfs1(A, i, pos));
}
}
memo1[pos, pre] = maxLeftLength + 1;
}
return memo1[pos, pre].Value;
}
int?[,] memo2 = new int?[111, 111];
int dfs2(int[] A, int pos, int pre) {
if (!memo2[pos, pre].HasValue) {
int d = Math.Abs(A[pos] - A[pre]);
int maxRightLength = 0;
for (int i = pos + 1; i < A.Length; i++) {
if (A[i] < A[pos] && Math.Abs(A[pos] - A[i]) < d) {
maxRightLength = Math.Max(maxRightLength, dfs2(A, i, pos));
}
}
memo2[pos, pre] = maxRightLength + 1;
}
return memo2[pos, pre].Value;
}
public void Run() {
var t = ni();
while (t-- > 0) {
var n = ni();
var A = ni(n);
int ans = 0;
this.memo1 = new int?[111, 111];
this.memo2 = new int?[111, 111];
for (int i = 0; i < n; i++) {
int maxLeftLength = 0;
int maxRightLength = 0;
for (int j = 0; j < i; j++) {
if (A[j] < A[i]) {
maxLeftLength = Math.Max(maxLeftLength, dfs1(A, j, i));
}
}
for (int j = i + 1; j < n; j++) {
if (A[j] < A[i]) {
maxRightLength = Math.Max(maxRightLength, dfs2(A, j, i));
}
}
ans = Math.Max(maxLeftLength + maxRightLength + 1, ans);
}
cout.WriteLine(ans);
}
}
}
// PREWRITEN CODE BEGINS FROM HERE
partial class Solver : Scanner {
public static void Main(string[] args) {
new Solver(Console.In, Console.Out).Run();
}
TextReader cin;
TextWriter cout;
public Solver(TextReader reader, TextWriter writer)
: base(reader) {
this.cin = reader;
this.cout = writer;
}
public Solver(string input, TextWriter writer)
: this(new StringReader(input), writer) {
}
public int ni() { return NextInt(); }
public int[] ni(int n) { return NextIntArray(n); }
public long nl() { return NextLong(); }
public long[] nl(int n) { return NextLongArray(n); }
public string ns() { return Next(); }
}
public class Scanner {
private TextReader Reader;
private Queue<String> TokenQueue = new Queue<string>();
private CultureInfo ci = CultureInfo.InvariantCulture;
public Scanner()
: this(Console.In) {
}
public Scanner(TextReader reader) {
this.Reader = reader;
}
public int NextInt() { return Int32.Parse(Next(), ci); }
public long NextLong() { return Int64.Parse(Next(), ci); }
public double NextDouble() { return double.Parse(Next(), ci); }
public string[] NextArray(int size) {
var array = new string[size];
for (int i = 0; i < size; i++) array[i] = Next();
return array;
}
public int[] NextIntArray(int size) {
var array = new int[size];
for (int i = 0; i < size; i++) array[i] = NextInt();
return array;
}
public long[] NextLongArray(int size) {
var array = new long[size];
for (int i = 0; i < size; i++) array[i] = NextLong();
return array;
}
public String Next() {
if (TokenQueue.Count == 0) {
if (!StockTokens()) throw new InvalidOperationException();
}
return TokenQueue.Dequeue();
}
public bool HasNext() {
if (TokenQueue.Count > 0)
return true;
return StockTokens();
}
private bool StockTokens() {
while (true) {
var line = Reader.ReadLine();
if (line == null) return false;
var tokens = line.Trim().Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length == 0) continue;
foreach (var token in tokens)
TokenQueue.Enqueue(token);
return true;
}
}
}
EmKjp