結果

問題 No.507 ゲーム大会(チーム決め)
ユーザー AreTrashAreTrash
提出日時 2019-01-17 12:43:55
言語 C#(csc)
(csc 3.9.0)
結果
WA  
実行時間 -
コード長 4,156 bytes
コンパイル時間 4,991 ms
コンパイル使用メモリ 115,316 KB
実行使用メモリ 29,552 KB
最終ジャッジ日時 2023-09-13 22:43:19
合計ジャッジ時間 6,926 ms
ジャッジサーバーID
(参考情報)
judge14 / judge11
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 64 ms
21,696 KB
testcase_01 AC 65 ms
21,752 KB
testcase_02 AC 65 ms
23,704 KB
testcase_03 WA -
testcase_04 AC 64 ms
21,700 KB
testcase_05 AC 64 ms
23,708 KB
testcase_06 AC 63 ms
23,804 KB
testcase_07 AC 166 ms
29,380 KB
testcase_08 WA -
testcase_09 AC 156 ms
27,384 KB
testcase_10 AC 156 ms
29,452 KB
testcase_11 AC 138 ms
29,404 KB
testcase_12 AC 156 ms
27,400 KB
testcase_13 WA -
testcase_14 WA -
testcase_15 WA -
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
testcase_19 AC 63 ms
21,832 KB
testcase_20 WA -
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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 #

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;

namespace No507
{
    public class Program
    {
        int N;
        int M;
        int K;
        int[] A;

        void Solve(StreamScanner ss, StreamWriter sw)
        {
            //---------------------------------
            N = ss.Next(int.Parse);
            M = ss.Next(int.Parse);
            K = ss.Next(int.Parse);
            A = ss.Next(int.Parse, N - 1).OrderByDescending(x => x).ToArray();

            var ret = BinarySearch.LowerBound(CountStrongPairs, M, 0, A.Length) - 1;
            sw.WriteLine(ret == -1 ? ret : A[ret]);
            //---------------------------------
        }

        int CountStrongPairs(long index)
        {
            var ret = 0;
            var right = A.Length - 1;

            for (var left = 0; left < A.Length; left++)
            {
                if (left == index) continue;
                if (left >= right) break;

                for (; left < right; right--)
                {
                    if (right == index || A[right] + A[left] <= A[index] + K) continue;
                    ret++;
                    break;
                }
            }

            return ret;
        }

        static void Main()
        {
            var ss = new StreamScanner(new StreamReader(Console.OpenStandardInput()));
            var sw = new StreamWriter(Console.OpenStandardOutput()) {AutoFlush = false};
            new Program().Solve(ss, sw);
            sw.Flush();
        }

        static readonly Func<string, string> String = s => s;
    }

    public static partial class BinarySearch
    {
        static long BoundToTheRight(Func<long, bool> pred, long left, long right)
        {
            if (left > right) throw new ArgumentException("left must <= right");

            while (true)
            {
                if (left == right) return right;
                var mid = (left + right - 1) / 2;
                if (pred(mid)) right = mid;
                else left = mid + 1;
            }
        }

        public static long LowerBound<T>(Func<long, T> func, T value, long left, long right) where T : IComparable<T>
        {
            return BoundToTheRight(x => func(x).CompareTo(value) >= 0, left, right);
        }

        public static long UpperBound<T>(Func<long, T> func, T value, long left, long right) where T : IComparable<T>
        {
            return BoundToTheRight(x => func(x).CompareTo(value) > 0, left, right);
        }

        public static int LowerBound<T>(this T[] source, T value) where T : IComparable<T>
        {
            return (int)LowerBound(x => source[x], value, 0, source.Length);
        }

        public static int UpperBound<T>(this T[] source, T value) where T : IComparable<T>
        {
            return (int)UpperBound(x => source[x], value, 0, source.Length);
        }

        public static int Range<T>(this T[] source, T vLeft, T vRight) where T : IComparable<T>
        {
            return source.UpperBound(vRight) - source.LowerBound(vLeft);
        }
    }

    public class StreamScanner
    {
        static readonly char[] Sep = {' '};
        readonly Queue<string> buffer = new Queue<string>();
        readonly TextReader textReader;

        public StreamScanner(TextReader textReader)
        {
            this.textReader = textReader;
        }

        public T Next<T>(Func<string, T> parser)
        {
            if (buffer.Count != 0) return parser(buffer.Dequeue());
            var nextStrings = textReader.ReadLine().Split(Sep, StringSplitOptions.RemoveEmptyEntries);
            foreach (var nextString in nextStrings) buffer.Enqueue(nextString);
            return Next(parser);
        }

        public T[] Next<T>(Func<string, T> parser, int x)
        {
            var ret = new T[x];
            for (var i = 0; i < x; ++i) ret[i] = Next(parser);
            return ret;
        }

        public T[][] Next<T>(Func<string, T> parser, int x, int y)
        {
            var ret = new T[y][];
            for (var i = 0; i < y; ++i) ret[i] = Next(parser, x);
            return ret;
        }
    }
}
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