結果

問題 No.604 誕生日のお小遣い
ユーザー くれちーくれちー
提出日時 2017-12-04 00:09:38
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 33 ms / 1,000 ms
コード長 13,426 bytes
コンパイル時間 1,321 ms
コンパイル使用メモリ 123,116 KB
実行使用メモリ 18,304 KB
最終ジャッジ日時 2024-11-21 19:13:47
合計ジャッジ時間 2,985 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
（要ログイン）

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 33 ms
18,048 KB
testcase_01 AC 32 ms
18,304 KB
testcase_02 AC 32 ms
18,176 KB
testcase_03 AC 33 ms
17,920 KB
testcase_04 AC 32 ms
18,048 KB
testcase_05 AC 33 ms
18,048 KB
testcase_06 AC 31 ms
18,176 KB
testcase_07 AC 32 ms
18,048 KB
testcase_08 AC 31 ms
18,048 KB
testcase_09 AC 32 ms
18,176 KB
testcase_10 AC 32 ms
18,048 KB
testcase_11 AC 32 ms
18,176 KB
testcase_12 AC 33 ms
18,176 KB
testcase_13 AC 33 ms
18,048 KB
testcase_14 AC 33 ms
18,304 KB
testcase_15 AC 32 ms
17,920 KB
testcase_16 AC 33 ms
18,048 KB
testcase_17 AC 32 ms
17,920 KB
testcase_18 AC 32 ms
18,176 KB
testcase_19 AC 32 ms
18,048 KB
testcase_20 AC 32 ms
18,304 KB
testcase_21 AC 33 ms
17,920 KB
testcase_22 AC 33 ms
18,048 KB
testcase_23 AC 32 ms
18,176 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;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using static System.Math;
using static Extensions;
using static MathExtensions;

public static class Program
{
    public static void Solve()
    {
        var (a, b, c) = (L, L, L);
        var ans = BinarySearchEx.LowerBound(y => (y - y / a) + (y / a * b) >= c, 0, long.MaxValue);
        Console.WriteLine(ans);
    }

    #region Scanners
    static Scanner _scanner;
    static char C => _scanner.NextChar();
    static string S => _scanner.NextString();
    static int I => _scanner.NextInt();
    static long L => _scanner.NextLong();
    static BigInteger B => _scanner.NextBigInteger();
    static double D => _scanner.NextDouble();
    static decimal M => _scanner.NextDecimal();
    #endregion

    public static void Main()
    {
        var sw = new StreamWriter(Console.OpenStandardOutput());
        sw.NewLine = "\n";
#if DEBUG
        sw.AutoFlush = true;
        //Console.SetError(sw);
#else
        sw.AutoFlush = false;
#endif
        Console.SetOut(sw);
        _scanner = new Scanner(Console.OpenStandardInput());
        Solve();
        Console.Out.Flush();
    }
}

public static class BinarySearchEx
{
    public static BigInteger LowerBound(Predicate<BigInteger> predicate, BigInteger minValue, BigInteger maxValue)
        => Search(predicate, maxValue, minValue - 1, out var i) ? i : i + 1;

    private static bool Search(Predicate<BigInteger> predicate, BigInteger ok, BigInteger ng, out BigInteger i)
    {
        while (BigInteger.Abs(ok - ng) > 1)
        {
            var mid = ng + (ok - ng) / 2;
            if (predicate(mid)) ok = mid;
            else ng = mid;
        }

        if (predicate(ok))
        {
            i = ok;
            return true;
        }
        else
        {
            i = default(BigInteger);
            return false;
        }
    }
}

public static partial class Extensions
{
}

#region Library
public class Scanner
{
    private readonly Stream _stream;
    private const int _bufferSize = 1024;
    private readonly byte[] _buf = new byte[_bufferSize];
    private int _len, _ptr;

    public Scanner(Stream stream)
    {
        _stream = stream;
    }

    public byte ReadByte()
    {
        if (_ptr >= _len)
        {
            _len = _stream.Read(_buf, 0, _bufferSize);
            _ptr = 0;
        }
        return _buf[_ptr++];
    }

    public char ReadChar() => (char)ReadByte();

    public string ReadLine()
    {
        var r = new StringBuilder();
        if (_ptr == 0) r.Append(ReadChar());
        for (; _ptr < _len; _ptr++) r.Append((char)_buf[_ptr]);
        return r.ToString();
    }

    public char NextChar() => char.Parse(NextString());

    public string NextString()
    {
        var r = new StringBuilder();
        var b = ReadChar();
        while (b != ' ' && b != '\n')
        {
            r.Append(b);
            b = ReadChar();
        }
        return r.ToString();
    }

    public int NextInt() => (int)NextLong();

    public long NextLong()
    {
        var r = 0L;
        var b = ReadByte();
        var n = b == '-';
        if (n) b = ReadByte();
        while (b != ' ' && b != '\n')
        {
            r = r * 10 + b - '0';
            b = ReadByte();
        }
        return n ? -r : r;
    }

    public BigInteger NextBigInteger()
    {
        var r = new BigInteger();
        var b = ReadByte();
        var n = b == '-';
        if (n) b = ReadByte();
        while (b != ' ' && b != '\n')
        {
            r = r * 10 + b - '0';
            b = ReadByte();
        }
        return n ? -r : r;
    }

    public double NextDouble()
    {
        var i = 0L;
        var b = ReadByte();
        var n = b == '-';
        if (n) b = ReadByte();
        while (b != '.' && b != ' ' && b != '\n')
        {
            i = i * 10 + b - '0';
            b = ReadByte();
        }
        if (b != '.') return n ? -i : i;
        b = ReadByte();
        var f = 0L;
        var p = 0;
        while (b != ' ' && b != '\n')
        {
            f = f * 10 + b - '0';
            b = ReadByte();
            p++;
        }
        var r = i + (double)f / MathExtensions.Pow(10, p);
        return n ? -r : r;
    }

    public decimal NextDecimal() => decimal.Parse(NextString());

    public T Next<T>(Converter<string, T> parser) => parser(NextString());
}

public static class BinarySearch
{
    // source[source.LowerBound(value)] <= value
    // Example:
    //   var source = new[] { 10, 30, 30, 50 };
    //   source.LowerBound(20) -> 1
    //   source.LowerBound(30) -> 1

    public static int LowerBound<T>(this IReadOnlyList<T> source, T value) where T : IComparable<T>
        => source.LowerBound(value, Comparer<T>.Default);

    public static int LowerBound<T>(this IReadOnlyList<T> source, T value, IComparer<T> comparer)
        => LowerBound(i => source[i], 0, source.Count - 1, value, comparer);

    public static int LowerBound<T>(
        Func<int, T> func, int minValue, int maxValue, T value) where T : IComparable<T>
        => LowerBound(func, minValue, maxValue, value, Comparer<T>.Default);

    public static int LowerBound<T>(
        Func<int, T> func, int minValue, int maxValue, T value, IComparer<T> comparer)
    {
        var i = LowerBound(x => comparer.Compare(func(x), value) >= 0, minValue, maxValue);
        return comparer.Compare(func(i), value) < 0 ? i + 1 : i;
    }

    public static int LowerBound(Predicate<int> predicate, int minValue, int maxValue)
        => Search(predicate, maxValue, minValue - 1, out var i) ? i : i + 1;

    // value < source[source.UpperBound(value)]
    // Example:
    //   var source = new[] { 10, 30, 30, 50 };
    //   source.UpperBound(20) -> 1
    //   source.UpperBound(30) -> 3
    //   source.UpperBound(50) -> 4

    public static int UpperBound<T>(this IReadOnlyList<T> source, T value) where T : IComparable<T>
        => source.UpperBound(value, Comparer<T>.Default);

    public static int UpperBound<T>(
        Func<int, T> func, int minValue, int maxValue, T value) where T : IComparable<T>
        => UpperBound(func, minValue, maxValue, value, Comparer<T>.Default);

    public static int UpperBound<T>(this IReadOnlyList<T> source, T value, IComparer<T> comparer)
        => UpperBound(i => source[i], 0, source.Count - 1, value, comparer);

    public static int UpperBound<T>(
        Func<int, T> func, int minValue, int maxValue, T value, IComparer<T> comparer)
    {
        var i = LowerBound(x => comparer.Compare(func(x), value) > 0, minValue, maxValue);
        return comparer.Compare(func(i), value) <= 0 ? i + 1 : i;
    }

    public static int UpperBound(Predicate<int> predicate, int minValue, int maxValue)
        => Search(predicate, minValue, maxValue + 1, out var i) ? i : i - 1;

    private static bool Search(Predicate<int> predicate, int ok, int ng, out int i)
    {
        while (Abs(ok - ng) > 1)
        {
            var mid = ng + (ok - ng) / 2;
            if (predicate(mid)) ok = mid;
            else ng = mid;
        }

        if (predicate(ok))
        {
            i = ok;
            return true;
        }
        else
        {
            i = default(int);
            return false;
        }
    }
}

[DebuggerStepThrough]
public static partial class Extensions
{
    public static void Assert(bool condition)
    {
        if (!condition) throw new Exception("Assertion failed");
    }

    public static string AsString(this IEnumerable<char> source) => new string(source.ToArray());

    public static void ForEach<T>(this IEnumerable<T> source, Action<T> action)
    {
        foreach (var item in source) action(item);
    }

    public static void ForEach<T, _>(this IEnumerable<T> source, Func<T, _> func)
    {
        foreach (var item in source) func(item);
    }

    public static void ForEach<T>(this IEnumerable<T> source, Action<T, int> action)
    {
        var i = 0;
        foreach (var item in source) action(item, i++);
    }

    public static void ForEach<T, _>(this IEnumerable<T> source, Func<T, int, _> func)
    {
        var i = 0;
        foreach (var item in source) func(item, i++);
    }

    public static T Iterate<T>(int count, T seed, Func<T, T> func)
    {
        var r = seed;
        for (var i = 0; i < count; i++) r = func(r);
        return r;
    }

    public static void Repeat(int count, Action action)
    {
        for (var i = 0; i < count; i++) action();
    }

    public static void Repeat(int count, Action<int> action)
    {
        for (var i = 0; i < count; i++) action(i);
    }

    public static IEnumerable<T> Repeat<T>(Func<T> func)
    {
        for (var i = 0; ; i++) yield return func();
    }

    public static IEnumerable<T> Repeat<T>(int count, Func<T> func)
    {
        for (var i = 0; i < count; i++) yield return func();
    }

    public static IEnumerable<T> Repeat<T>(Func<int, T> func)
    {
        for (var i = 0; ; i++) yield return func(i);
    }

    public static IEnumerable<T> Repeat<T>(int count, Func<int, T> func)
    {
        for (var i = 0; i < count; i++) yield return func(i);
    }

    public static void Swap<T>(ref T x, ref T y)
    {
        var tmp = x; x = y; y = tmp;
    }

    public static (T1[], T2[]) Unzip<T1, T2>(this ICollection<(T1, T2)> source)
    {
        var ts1 = new T1[source.Count];
        var ts2 = new T2[source.Count];
        var i = 0;
        foreach (var (t1, t2) in source) { ts1[i] = t1; ts2[i] = t2; i++; }
        return (ts1, ts2);
    }

    public static (T1[], T2[], T3[]) Unzip<T1, T2, T3>(this ICollection<(T1, T2, T3)> source)
    {
        var ts1 = new T1[source.Count];
        var ts2 = new T2[source.Count];
        var ts3 = new T3[source.Count];
        var i = 0;
        foreach (var (t1, t2, t3) in source) { ts1[i] = t1; ts2[i] = t2; ts3[i] = t3; i++; }
        return (ts1, ts2, ts3);
    }

    public static (T1[], T2[], T3[], T4[]) Unzip<T1, T2, T3, T4>(this ICollection<(T1, T2, T3, T4)> source)
    {
        var ts1 = new T1[source.Count];
        var ts2 = new T2[source.Count];
        var ts3 = new T3[source.Count];
        var ts4 = new T4[source.Count];
        var i = 0;
        foreach (var (t1, t2, t3, t4) in source) { ts1[i] = t1; ts2[i] = t2; ts3[i] = t3; ts4[i] = t4; i++; }
        return (ts1, ts2, ts3, ts4);
    }

    public static IEnumerable<T> Zip<T1, T2, T3, T>(this IEnumerable<T1> first, IEnumerable<T2> second, IEnumerable<T3> thrid, Func<T1, T2, T3, T> resultSelector)
    {
        using (var e1 = first.GetEnumerator())
        using (var e2 = second.GetEnumerator())
        using (var e3 = thrid.GetEnumerator())
        {
            while (e1.MoveNext() && e2.MoveNext() && e3.MoveNext())
                yield return resultSelector(e1.Current, e2.Current, e3.Current);
        }
    }

    public static IEnumerable<T> Zip<T1, T2, T3, T4, T>(this IEnumerable<T1> first, IEnumerable<T2> second, IEnumerable<T3> thrid, IEnumerable<T4> fourth, Func<T1, T2, T3, T4, T> resultSelector)
    {
        using (var e1 = first.GetEnumerator())
        using (var e2 = second.GetEnumerator())
        using (var e3 = thrid.GetEnumerator())
        using (var e4 = fourth.GetEnumerator())
        {
            while (e1.MoveNext() && e2.MoveNext() && e3.MoveNext() && e4.MoveNext())
                yield return resultSelector(e1.Current, e2.Current, e3.Current, e4.Current);
        }
    }
}

[DebuggerStepThrough]
public static class MathExtensions
{
    public static int Gcd(int left, int right)
    {
        int r;
        while ((r = left % right) != 0) { left = right; right = r; }
        return right;
    }

    public static long Gcd(long left, long right)
    {
        long r;
        while ((r = left % right) != 0L) { left = right; right = r; }
        return right;
    }

    public static BigInteger Gcd(BigInteger left, BigInteger right)
        => BigInteger.GreatestCommonDivisor(left, right);

    public static int HighestOneBit(int x)
    {
        x |= x >> 01;
        x |= x >> 02;
        x |= x >> 04;
        x |= x >> 08;
        x |= x >> 16;
        return x - (x >> 1);
    }

    public static long HighestOneBit(long x)
    {
        x |= x >> 01;
        x |= x >> 02;
        x |= x >> 04;
        x |= x >> 08;
        x |= x >> 16;
        x |= x >> 32;
        return x - (x >> 1);
    }

    public static int Lcm(int left, int right) => left / Gcd(left, right) * right;

    public static long Lcm(long left, long right) => left / Gcd(left, right) * right;

    public static BigInteger Lcm(BigInteger left, BigInteger right)
        => left / Gcd(left, right) * right;

    public static int Pow(int value, int exponent)
    {
        var r = 1;
        while (exponent > 0)
        {
            if ((exponent & 1) == 1) r *= value;
            value *= value;
            exponent >>= 1;
        }
        return r;
    }

    public static long Pow(long value, int exponent)
    {
        var r = 1L;
        while (exponent > 0)
        {
            if ((exponent & 1) == 1) r *= value;
            value *= value;
            exponent >>= 1;
        }
        return r;
    }

    public static long Fact(int value)
    {
        var r = 1L;
        for (var i = 2; i <= value; i++) r *= i;
        return r;
    }
}
#endregion
0