結果
問題 | No.2248 max(C)-min(C) |
ユーザー | kakel-san |
提出日時 | 2023-03-17 22:37:48 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 863 ms / 3,000 ms |
コード長 | 3,813 bytes |
コンパイル時間 | 6,211 ms |
コンパイル使用メモリ | 111,796 KB |
実行使用メモリ | 62,852 KB |
最終ジャッジ日時 | 2024-09-18 11:44:10 |
合計ジャッジ時間 | 32,150 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 51 |
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 static System.Console; using System.Linq; using System.Collections.Generic; class Program { static int NN => int.Parse(ReadLine()); static int[] NList => ReadLine().Split().Select(int.Parse).ToArray(); static int[] NMi => ReadLine().Split().Select(c => int.Parse(c) - 1).ToArray(); static int[][] NMap(int n) => Enumerable.Repeat(0, n).Select(_ => NMi).ToArray(); public static void Main() { Solve(); } static void Solve() { var n = NN; var a = NList; var b = NList; var s = new int[n]; var m = new int[n]; var l = new int[n]; for (var i = 0; i < n; ++i) { s[i] = Math.Min(a[i], b[i]); m[i] = (a[i] + b[i]) / 2; l[i] = Math.Max(a[i], b[i]); } var q = new PriorityQueue<Pair>(n, false); var max = 0; for (var i = 0; i < n; ++i) { q.Enqueue(new Pair(i, 0, s[i])); max = Math.Max(max, s[i]); } var ans = l.Max() - l.Min(); var lmin = int.MaxValue; while (q.Count > 0) { ans = Math.Min(ans, max - Math.Min(q.List[0].Val, lmin)); var cur = q.Dequeue(); if (cur.Kind == 0) { q.Enqueue(new Pair(cur.Pos, 1, m[cur.Pos])); max = Math.Max(max, m[cur.Pos]); } else if (cur.Kind == 1) { max = Math.Max(max, l[cur.Pos]); lmin = Math.Min(lmin, l[cur.Pos]); } } WriteLine(ans); } class Pair : IComparable<Pair> { public int Pos; public int Kind; public int Val; public Pair(int pos, int kind, int val) { Pos = pos; Kind = kind; Val = val; } public int CompareTo(Pair b) { return Val.CompareTo(b.Val); } } class PriorityQueue<T> where T : IComparable<T> { public T[] List; public int Count; bool IsTopMax; public PriorityQueue(int count, bool isTopMax) { IsTopMax = isTopMax; List = new T[Math.Max(128, count)]; } public void Enqueue(T value) { if (Count == List.Length) { var newlist = new T[List.Length * 2]; for (var i = 0; i < List.Length; ++i) newlist[i] = List[i]; List = newlist; } var pos = Count; List[pos] = value; ++Count; while (pos > 0) { var parent = (pos - 1) / 2; if (Calc(List[parent], List[pos], true)) break; Swap(parent, pos); pos = parent; } } public T Dequeue() { --Count; Swap(0, Count); var pos = 0; while (true) { var child = pos * 2 + 1; if (child >= Count) break; if (child + 1 < Count && Calc(List[child + 1], List[child], false)) ++child; if (Calc(List[pos], List[child], true)) break; Swap(pos, child); pos = child; } return List[Count]; } bool Calc(T a, T b, bool equalVal) { var ret = a.CompareTo(b); if (ret == 0 && equalVal) return true; return IsTopMax ? ret > 0 : ret < 0; } void Swap(int a, int b) { var tmp = List[a]; List[a] = List[b]; List[b] = tmp; } } }