結果
| 問題 |
No.711 競技レーティング単調増加
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2018-09-27 16:29:40 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 138 ms / 2,000 ms |
| コード長 | 2,881 bytes |
| コンパイル時間 | 1,043 ms |
| コンパイル使用メモリ | 115,116 KB |
| 実行使用メモリ | 48,704 KB |
| 最終ジャッジ日時 | 2024-10-12 04:28:29 |
| 合計ジャッジ時間 | 6,549 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 41 |
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 System.IO;
//using System.Text;
//using System.Text.RegularExpressions;
//using System.Globalization;
//using System.Diagnostics;
using static System.Console;
//using System.Numerics;
//using static System.Math;
//using pair = Pair<int, int>;
class Program
{
static void Main()
{
//SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
new Program().solve();
Out.Flush();
}
Scanner cin = new Scanner();
readonly int[] dd = { 0, 1, 0, -1, 0 }; //→↓←↑
readonly int mod = 1000000007;
void chmax<T>(ref T a, T b) where T : IComparable<T> { a = a.CompareTo(b) < 0 ? b : a; }
void chmin<T>(ref T a, T b) where T : IComparable<T> { a = a.CompareTo(b) < 0 ? a : b; }
void solve()
{
int N = cin.nextint;
var A = cin.scanint;
var B = Enumerable.Range(0, N).Select(i => A[i] - i).ToArray();
WriteLine(N - lis(B));
}
int lis(int[] A)
{
var dp = new int[A.Length];
for (int i = 0; i < A.Length; i++)
{
dp[i] = int.MaxValue;
}
foreach (var i in A)
{
if (i <= 0) continue;
dp[upper_bound(dp, i)] = i;
}
return lower_bound(dp, int.MaxValue);
}
int upper_bound(int[] arr, int val)
{
int low = 0, high = arr.Count();
int mid;
while (low < high)
{
mid = ((high - low) >> 1) + low;
if (arr[mid] <= val) low = mid + 1;
else high = mid;
}
return low;
}
int lower_bound(int[] arr, int val)
{
int low = 0, high = arr.Count();
int mid;
while (low < high)
{
mid = ((high - low) >> 1) + low;
if (arr[mid] < val) low = mid + 1;
else high = mid;
}
return low;
}
}
class Scanner
{
string[] s; int i;
char[] cs = new char[] { ' ' };
public Scanner() { s = new string[0]; i = 0; }
public string[] scan { get { return ReadLine().Split(); } }
public int[] scanint { get { return Array.ConvertAll(scan, int.Parse); } }
public long[] scanlong { get { return Array.ConvertAll(scan, long.Parse); } }
public double[] scandouble { get { return Array.ConvertAll(scan, double.Parse); } }
public string next
{
get
{
if (i < s.Length) return s[i++];
string st = ReadLine();
while (st == "") st = ReadLine();
s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
i = 0;
return next;
}
}
public int nextint { get { return int.Parse(next); } }
public long nextlong { get { return long.Parse(next); } }
public double nextdouble { get { return double.Parse(next); } }
}