結果
| 問題 | No.507 ゲーム大会(チーム決め) | 
| コンテスト | |
| ユーザー |  AreTrash | 
| 提出日時 | 2019-01-17 12:58:45 | 
| 言語 | C#(csc) (csc 3.9.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 128 ms / 3,000 ms | 
| コード長 | 4,143 bytes | 
| コンパイル時間 | 1,037 ms | 
| コンパイル使用メモリ | 117,256 KB | 
| 実行使用メモリ | 32,664 KB | 
| 最終ジャッジ日時 | 2024-07-01 06:57:18 | 
| 合計ジャッジ時間 | 3,603 ms | 
| ジャッジサーバーID (参考情報) | judge1 / judge3 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 2 | 
| other | AC * 19 | 
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.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;
            for (int left = 0, right = A.Length - 1; left < A.Length && left < right; left++)
            {
                if (left == index) continue;
                for (; left < right; right--)
                {
                    if (right == index || A[right] + A[left] <= A[index] + K) continue;
                    right--;
                    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;
        }
    }
}
            
            
            
        