結果

問題 No.550 夏休みの思い出（１）
ユーザー claw88
提出日時 2017-07-29 00:00:22
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 42 ms / 2,000 ms
コード長 4,218 bytes
コンパイル時間 943 ms
コンパイル使用メモリ 113,008 KB
実行使用メモリ 28,988 KB
最終ジャッジ日時 2024-10-11 05:33:30
合計ジャッジ時間 4,756 ms
ジャッジサーバーID
（参考情報） 		judge4 / 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 * 3
other AC * 55
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 # 

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Globalization;
using System.Diagnostics;
using static System.Console;
using Pair = System.Collections.Generic.KeyValuePair<int, int>;
using System.Numerics;

class Program
{
    static void Main()
    {
        //SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
        new Program().Solve();
        Out.Flush();
    }
    Scanner cin = new Scanner();
    Random rnd = new Random();
    Stopwatch sw = new Stopwatch();
    readonly int[] dd = { 0, 1, 0, -1, 0 };
    readonly int mod = 1000000007;
    readonly string alfa = "abcdefghijklmnopqrstuvwxyz";


    BigInteger calc(BigInteger x)
    {
        return -A * x * x - B * x - x * x * x - C;
    }
    BigInteger A, B, C;

    BigInteger calc2(BigInteger x)
    {
        return -A * x * x - B * x - C;
    }


    void Solve()
    {
        A = cin.Nextlong;
        B = cin.Nextlong;
        C = cin.Nextlong;

        int l = -1000000000;
        int r = 1000000000;

        var cl = calc(l);
        var cr = calc(r);
        while ((cl > 0 && cr > 0) || (cl < 0 && cr < 0))
        {
            r -= 1000;
            cr = calc(r);
            if ((cl > 0 && cr > 0) || (cl < 0 && cr < 0))
            {
                l += 1000;
                cl = calc(l);
            }
        }

        //WriteLine(l + " " + r);
        //WriteLine(cl + " " + cr);

        BigInteger X;
        while (true)
        {
            int mid = (l + r) / 2;
            var cmid = calc(mid);
            //WriteLine(l + " "  + r + " " + mid + " " + cmid);
            if (cmid == 0)
            {
                X = mid;
                break;
            }
            if (cmid > 0)
            {
                if (cl > 0)
                {
                    cl = cmid;
                    l = mid;
                }
                else
                {
                    cr = cmid;
                    r = mid;
                }
            }
            else
            {
                if (cl < 0)
                {
                    cl = cmid;
                    l = mid;
                }
                else
                {
                    cr = cmid;
                    r = mid;
                }
            }

        }
        var ans = new BigInteger[3];
        ans[0] = X;
        //WriteLine(X);

        BigInteger a, b, c;
        a = 1;
        b = a * X + A;
        c = b * X + B;

        if (c == 0)
        {
            ans[2] = 0;
            ans[3] = -b / a;
            Array.Sort(ans);
            WriteLine(string.Join(" ", ans));
            return;
        }
        long min = 0;
        long max = long.MaxValue;
        long m = -1;
        BigInteger D = b * b - 4 * c;
        while (min < max)
        {
            m = (max - min) / 2 + min;
            if ((BigInteger)m * m == D)
            {
                break;
            }
            else if ((BigInteger)m * m > D)
            {
                max = m;
            }
            else
            {
                min = m;
            }
        }



        ans[1] = (-b + m) / 2;

        ans[2] = (-b - m) / 2;
        Array.Sort(ans);
        WriteLine(string.Join(" ", ans));
    }

}


class Scanner
{
    string[] s; int i;
    char[] cs = new char[] { ' ' };
    public Scanner() { s = new string[0]; i = 0; }
    public string[] Scan { get { return ReadLine().Split(); } }
    public int[] Scanint { get { return Array.ConvertAll(Scan, int.Parse); } }
    public long[] Scanlong { get { return Array.ConvertAll(Scan, long.Parse); } }
    public double[] Scandouble { get { return Array.ConvertAll(Scan, double.Parse); } }
    public string Next
    {
        get
        {
            if (i < s.Length) return s[i++];
            string st = ReadLine();
            while (st == "") st = ReadLine();
            s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
            i = 0;
            return Next;
        }
    }
    public int Nextint { get { return int.Parse(Next); } }
    public long Nextlong { get { return long.Parse(Next); } }
    public double Nextdouble { get { return double.Parse(Next); } }
}
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