結果

問題 No.2510 Six Cube Sum Counting
ユーザー crimsonteacrimsontea
提出日時 2023-10-20 22:58:23
言語 C#
(.NET 8.0.203)
結果
AC  
実行時間 3,330 ms / 4,000 ms
コード長 3,975 bytes
コンパイル時間 13,226 ms
コンパイル使用メモリ 160,880 KB
実行使用メモリ 248,884 KB
最終ジャッジ日時 2023-10-20 23:00:24
合計ジャッジ時間 116,126 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge14
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 3,248 ms
104,048 KB
testcase_01 AC 3,246 ms
104,048 KB
testcase_02 AC 3,305 ms
104,040 KB
testcase_03 AC 3,249 ms
104,060 KB
testcase_04 AC 3,253 ms
104,048 KB
testcase_05 AC 3,249 ms
104,060 KB
testcase_06 AC 3,257 ms
104,052 KB
testcase_07 AC 3,257 ms
104,064 KB
testcase_08 AC 3,256 ms
104,032 KB
testcase_09 AC 3,258 ms
104,040 KB
testcase_10 AC 3,252 ms
104,048 KB
testcase_11 AC 3,254 ms
104,048 KB
testcase_12 AC 3,256 ms
104,048 KB
testcase_13 AC 3,240 ms
104,048 KB
testcase_14 AC 3,257 ms
104,048 KB
testcase_15 AC 3,247 ms
104,048 KB
testcase_16 AC 3,247 ms
104,048 KB
testcase_17 AC 3,248 ms
104,060 KB
testcase_18 AC 3,249 ms
104,060 KB
testcase_19 AC 3,250 ms
104,060 KB
testcase_20 AC 3,291 ms
104,052 KB
testcase_21 AC 3,330 ms
104,032 KB
testcase_22 AC 3,315 ms
104,052 KB
testcase_23 AC 3,304 ms
104,052 KB
testcase_24 AC 3,307 ms
104,040 KB
testcase_25 AC 3,256 ms
104,032 KB
testcase_26 AC 3,261 ms
104,040 KB
testcase_27 AC 3,316 ms
104,040 KB
testcase_28 AC 3,257 ms
104,052 KB
testcase_29 AC 3,316 ms
248,884 KB
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コンパイルメッセージ
  復元対象のプロジェクトを決定しています...
  /home/judge/data/code/main.csproj を復元しました (106 ms)。
MSBuild のバージョン 17.7.3+8ec440e68 (.NET)
  main -> /home/judge/data/code/bin/Release/net7.0/main.dll
  main -> /home/judge/data/code/bin/Release/net7.0/publish/

ソースコード

diff # 

#nullable enable
using System;
using System.Linq;
using System.Collections;
using System.IO;
using System.Collections.Generic;
using System.Text;
using System.Numerics;
using System.Runtime.Intrinsics.X86;
using System.Buffers;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using static InputUtility;
using System.Reflection;

class Program
{
    static void Main()
    {
        InputNewLine();
        var x = NextInt32;

        Stopwatch sw = Stopwatch.StartNew();

        var abc = Abc();
        static (int v, int c)[] Abc()
        {
            Span<int> n3 = stackalloc int[301];
            for (int i = 0; i < n3.Length; i++)
            {
                n3[i] = i * i * i;
            }

            (int v, int c)[] abc = new (int v, int c)[4590551];
            int index = 0;
            for (int a = 0; a < n3.Length; a++)
            {
                for (int b = a; b < n3.Length; b++)
                {
                    for (int c = b; c < n3.Length; c++)
                    {
                        abc[index++] = (n3[a] + n3[b] + n3[c], c);
                    }
                }
            }

            return abc;
        }

        Array.Sort(abc);

        var def = Def();

        static (int v, int d)[] Def()
        {
            Span<int> n3 = stackalloc int[301];
            for (int i = 0; i < n3.Length; i++)
            {
                n3[i] = i * i * i;
            }

            (int v, int c)[] abc = new (int v, int c)[4590551];
            int index = 0;
            for (int a = 0; a < n3.Length; a++)
            {
                for (int b = a; b < n3.Length; b++)
                {
                    for (int c = b; c < n3.Length; c++)
                    {
                        abc[index++] = (n3[a] + n3[b] + n3[c], a);
                    }
                }
            }

            return abc;
        }

        Array.Sort(def);

        int res = 0;
        int right = def.Length - 1;

        foreach (var (v, c) in abc)
        {
            var target = x - v;

            if (target < 0) { break; }

            while (right >= 0 && target < def[right].v)
            {
                right--;
            }

            for (int i = right; i >= 0; i--)
            {
                if (target != def[i].v)
                {
                    break;
                }

                if (c <= def[i].d)
                {
                    res++;
                }
                else
                {
                    break;
                }
            }
        }

        Console.WriteLine(res);
    }
}

public static class InputUtility
{
    private static string[]? s_inputs;
    private static string? s_raw;
    private static int s_index = 0;

    private static void Init() => s_index = 0;
    public static int NextInt32 => int.Parse(s_inputs![s_index++]!);
    public static uint NextUInt32 => uint.Parse(s_inputs![s_index++]!);
    public static long NextInt64 => long.Parse(s_inputs![s_index++]!);
    public static string NextString => s_inputs![s_index++];
    public static char NextChar => s_inputs![s_index++][0];
    public static int[] GetInt32Array() => s_inputs!.Select(int.Parse).ToArray();
    public static long[] GetInt64Array() => s_inputs!.Select(long.Parse).ToArray();
    public static string GetRawString() => s_raw!;
#if DEBUG
    private static TextReader? s_textReader;
    public static void SetSource(string path) => s_textReader = new StringReader(File.ReadAllText(path));
#endif
    public static bool InputNewLine()
    {
#if DEBUG
        if (s_textReader is TextReader sr)
        {
            Init();
            s_raw = sr.ReadLine()!;
            s_inputs = s_raw.Split(' ', StringSplitOptions.RemoveEmptyEntries);
            return true;
        }
#endif
        Init();
        s_raw = Console.ReadLine()!;
        s_inputs = s_raw.Split(' ', StringSplitOptions.RemoveEmptyEntries);
        return true;
    }
}
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