結果

問題 No.1028 闇討ち
ユーザー 紙ぺーぱー
提出日時 2020-04-17 22:46:00
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 506 ms / 2,000 ms
コード長 3,821 bytes
コンパイル時間 2,314 ms
コンパイル使用メモリ 115,532 KB
実行使用メモリ 41,088 KB
最終ジャッジ日時 2024-10-03 14:26:28
合計ジャッジ時間 8,551 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 20
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

using System;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using Debug = System.Diagnostics.Trace;
using SB = System.Text.StringBuilder;
using static System.Math;
using Number = System.Int64;
using static System.Numerics.BigInteger;
namespace Program {
    public class Solver {
        Random rnd = new Random(0);
        public void Solve() {
            var n = ri;
            var pos = Enumerate(n, x => new List<KeyValuePair<int, int>>());
            for (int i = 0; i < n; i++)
                for (int j = 0; j < n; j++) {
                    var p = ri - 1; pos[p].Add(new KeyValuePair<int, int>(i, j));
                }
            var ans = 0L;
            for (int i = 0; i < n; i++) {
                var a = pos[i];
                Func<int, long> f = y => {
                    var ret = 0L;
                    foreach (var kv in a)
                        ret += Max(Abs(kv.Key - y), kv.Value);
                    return ret;
                };
                var l = -1; var r = n;
                while (r - l > 1) {
                    var x = (l + r) / 2;
                    var u = f(x);
                    var v = f(x + 1);
                    if (u >= v) l = x;
                    else r = x;
                }
                ans += f(r);
            }
            Console.WriteLine(ans);
        }
        const long INF = 1L << 60;
        static int[] dx = { -1, 0, 1, 0 };
        static int[] dy = { 0, 1, 0, -1 };
        int ri { get { return sc.Integer(); } }
        long rl { get { return sc.Long(); } }
        double rd { get { return sc.Double(); } }
        string rs { get { return sc.Scan(); } }
        public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
        static T[] Enumerate<T>(int n, Func<int, T> f) {
            var a = new T[n]; for (int i = 0; i < a.Length; ++i) a[i] = f(i); return a;
        }
        static T[][] Enumerate<T>(int n, int m, Func<int, int, T> f) {
            return Enumerate(n, x => Enumerate(m, y => f(x, y)));
        }
        static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
    }
}
#region main
static class Ex {
    static public string AsString(this IEnumerable<char> ie) { return new string(ie.ToArray()); }
    static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") {
        return string.Join(st, ie);
    }
    static public void Main() {
        Console.SetOut(new Program.IO.Printer(Console.OpenStandardOutput()) { AutoFlush = false });
        var solver = new Program.Solver();
        var t = new System.Threading.Thread(solver.Solve, 100000000);
        t.Start();
        t.Join();
        //*/
        //solver.Solve();
        Console.Out.Flush();
    }
}
#endregion
#region Ex
namespace Program.IO {
    using System.IO;
    using System.Text;
    using System.Globalization;
    public class Printer : StreamWriter {
        public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
        public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
    }
    public class StreamScanner {
        public StreamScanner(Stream stream) { str = stream; }
        public readonly Stream str;
        private readonly byte[] buf = new byte[1024];
        private int len, ptr;
        public bool isEof = false;
        public bool IsEndOfStream { get { return isEof; } }
        private byte read() {
            if (isEof) return 0;
            if (ptr >= len) {
                ptr = 0;
                if ((len = str.Read(buf, 0, 1024)) <= 0) {
                    isEof = true;
                    return 0;
                }
            }
            return buf[ptr++];
        }
        public char Char() {
            byte b = 0;
            do b = read(); while ((b < 33 || 126 < b) && !isEof);
            return (char)b;
        }
        public string Scan() {
            var sb = new StringBuilder();
            for (var b = Char(); b >= 33 && b <= 126; b = (char)read()) sb.Append(b);
            return sb.ToString();
        }
        public string ScanLine() {
            var sb = new StringBuilder();
            for (var b = Char(); b != '\n' && b != 0; b = (char)read()) if (b != '\r') sb.Append(b);
            return sb.ToString();
        }
        public long Long() { return isEof ? long.MinValue : long.Parse(Scan()); }
        public int Integer() { return isEof ? int.MinValue : int.Parse(Scan()); }
        public double Double() { return isEof ? double.NaN : double.Parse(Scan(), CultureInfo.InvariantCulture); }
    }
}
#endregion
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