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 00:18:15
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 41 ms / 2,000 ms
コード長 3,442 bytes
コンパイル時間 2,987 ms
コンパイル使用メモリ 114,280 KB
実行使用メモリ 30,924 KB
最終ジャッジ日時 2024-10-11 05:33:37
合計ジャッジ時間 4,700 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
このコードへのチャレンジ
(要ログイン)
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[] ans;

    void Solve()
    {
        ans = new BigInteger[3];
        A = cin.Nextlong;
        B = cin.Nextlong;
        C = cin.Nextlong;

        //一つの解を求める
        int l = -1000000000;
        int r = 1000000000;

        var cl = calc(l);
        var cr = calc(r);

        while (true)
        {
            int mid = (l + r) / 2;
            var cmid = calc(mid);
            if (cmid > 0)
            {
                if (cl > 0)
                {
                    cl = cmid;
                    l = mid;
                }
                else
                {
                    cr = cmid;
                    r = mid;
                }
            }
            else if(cmid < 0)
            {
                if (cl < 0)
                {
                    cl = cmid;
                    l = mid;
                }
                else
                {
                    cr = cmid;
                    r = mid;
                }
            }
            if (cmid == 0)
            {
                ans[0] = mid;
                break;
            }
        }

        //2次方程式パート
        BigInteger a, b, c;
        a = 1;
        b = a * ans[0] + A;
        c = b * ans[0] + B;
        long min = 0;
        long max = long.MaxValue;
        long d = -1;
        BigInteger D = b * b - 4 * c;
        while (true)
        {
            d = (max - min) / 2 + min;
            if ((BigInteger)d * d < D) min = d;
            else if ((BigInteger)d * d > D) max = d;
            else break;
        }
        ans[1] = (-b + d) / 2;
        ans[2] = (-b - d) / 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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