結果

問題 No.461 三角形はいくつ?
ユーザー りあんりあん
提出日時 2016-12-09 13:31:19
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 1,185 ms / 5,000 ms
コード長 3,550 bytes
コンパイル時間 2,291 ms
コンパイル使用メモリ 115,904 KB
実行使用メモリ 21,120 KB
最終ジャッジ日時 2024-11-29 03:25:07
合計ジャッジ時間 16,560 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
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 29 ms
19,200 KB
testcase_01 AC 30 ms
18,944 KB
testcase_02 AC 30 ms
18,944 KB
testcase_03 AC 24 ms
17,536 KB
testcase_04 AC 32 ms
19,072 KB
testcase_05 AC 583 ms
20,864 KB
testcase_06 AC 342 ms
20,224 KB
testcase_07 AC 394 ms
20,352 KB
testcase_08 AC 278 ms
20,096 KB
testcase_09 AC 31 ms
18,816 KB
testcase_10 AC 106 ms
19,456 KB
testcase_11 AC 448 ms
20,480 KB
testcase_12 AC 216 ms
19,968 KB
testcase_13 AC 658 ms
20,864 KB
testcase_14 AC 623 ms
20,864 KB
testcase_15 AC 665 ms
20,736 KB
testcase_16 AC 62 ms
20,864 KB
testcase_17 AC 62 ms
20,992 KB
testcase_18 AC 1,176 ms
20,864 KB
testcase_19 AC 1,185 ms
20,992 KB
testcase_20 AC 643 ms
20,968 KB
testcase_21 AC 680 ms
20,844 KB
testcase_22 AC 660 ms
20,976 KB
testcase_23 AC 138 ms
20,832 KB
testcase_24 AC 130 ms
20,736 KB
testcase_25 AC 39 ms
20,864 KB
testcase_26 AC 39 ms
20,864 KB
testcase_27 AC 40 ms
21,120 KB
testcase_28 AC 40 ms
20,864 KB
testcase_29 AC 279 ms
20,864 KB
testcase_30 AC 149 ms
20,864 KB
testcase_31 AC 501 ms
21,120 KB
testcase_32 AC 655 ms
20,864 KB
testcase_33 AC 39 ms
20,864 KB
testcase_34 AC 39 ms
20,736 KB
testcase_35 AC 38 ms
20,992 KB
testcase_36 AC 212 ms
20,976 KB
testcase_37 AC 203 ms
20,848 KB
testcase_38 AC 215 ms
20,840 KB
testcase_39 AC 194 ms
20,968 KB
testcase_40 AC 205 ms
21,112 KB
testcase_41 AC 220 ms
20,964 KB
testcase_42 AC 587 ms
20,864 KB
testcase_43 AC 605 ms
20,864 KB
testcase_44 AC 586 ms
21,120 KB
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.Linq.Expressions;
using System.IO;

class Program
{
    static StreamWriter sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
    static Scan sc = new Scan();
    static void Main()
    {
        int n = sc.Int;
        var lines = new List<long[]>[3];
        for (int i = 0; i < 3; i++)
        {
            lines[i] = new List<long[]>();
            lines[i].Add(new long[]{ 0, 1 });
        }
        for (int i = 0; i < n; i++)
        {
            var a = sc.IntArr;

            var g = mymath.gcd(a[1], a[2]);
            lines[a[0]].Add(new long[]{ a[2] / g, (a[1] + a[2]) / g });
        }

        for (int i = 0; i < 3; i++)
            lines[i].Sort((x, y) => (x[0] * y[1]).CompareTo(y[0] * x[1]));

        if (lines[0].Count > lines[2].Count)
            swap(ref lines[0], ref lines[2]);
        if (lines[1].Count > lines[2].Count)
            swap(ref lines[1], ref lines[2]);

        long ans = 0;
        foreach (var a in lines[0])
        {
            foreach (var b in lines[1])
            {
                if (!okay(a, b)) continue;

                long s = a[0] * b[1] + a[1] * b[0], t = a[1] * b[1];
                var g = mymath.gcd(s, t);
                s /= g;
                t /= g;
                int ok = 0, ng = lines[2].Count;
                while (ok < ng - 1)
                {
                    int m = (ok + ng) >> 1;
                    var c = lines[2][m];
                    if (okay(a, c) && okay(b, c))
                        ok = m;
                    else
                        ng = m;
                }
                ans += ok + 1;
                long u = t - s;
                int l = 0, r = lines[2].Count - 1;
                while (true)
                {
                    int m = (l + r) >> 1;
                    var c = lines[2][m];
                    if (t * c[0] == u * c[1])
                    {
                        --ans;
                        break;
                    }
                    if (l >= r) break;

                    if (t * c[0] < u * c[1])
                        l = m + 1;
                    else
                        r = m - 1;
                }
            }
        }
        sw.WriteLine(ans);
        sw.Flush();
    }
    static bool okay(long[] a, long[] b) => a[0] * b[1] + a[1] * b[0] <= a[1] * b[1];
    static void swap<T>(ref T a, ref T b) { var t = a; a = b; b = t; }
    static void DBG<T>(params T[] a) => Console.WriteLine(string.Join(" ", a));
    static void DBG(params object[] a) => Console.WriteLine(string.Join(" ", a));
}
class Scan
{
    public int Int => int.Parse(Str);
    public long Long => long.Parse(Str);
    public double Double => double.Parse(Str);
    public string Str => Console.ReadLine().Trim();
    public int[] IntArr => StrArr.Select(int.Parse).ToArray();
    public long[] LongArr => StrArr.Select(long.Parse).ToArray();
    public double[] DoubleArr => StrArr.Select(double.Parse).ToArray();
    public string[] StrArr => Str.Split();
}
class mymath
{
    public static long gcd(long a, long b)
    {
        while (b > 0) { var t = a % b; a = b; b = t; }
        return a;
    }
    // a x + b y = gcd(a, b)
    public static long extgcd(long a, long b, out long x, out long y)
    {
        long g = a; x = 1; y = 0;
        if (b > 0) { g = extgcd(b, a % b, out y, out x); y -= a / b * x; }
        return g;
    }
    public static long lcm(long a, long b) => a / gcd(a, b) * b;
}
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