結果

問題 No.673 カブトムシ
ユーザー AreTrashAreTrash
提出日時 2018-05-04 19:43:50
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 28 ms / 2,000 ms
コード長 3,895 bytes
コンパイル時間 1,024 ms
コンパイル使用メモリ 114,652 KB
実行使用メモリ 25,916 KB
最終ジャッジ日時 2024-06-30 06:38:57
合計ジャッジ時間 2,723 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 24 ms
23,932 KB
testcase_01 AC 26 ms
24,108 KB
testcase_02 AC 26 ms
25,792 KB
testcase_03 AC 25 ms
23,736 KB
testcase_04 AC 26 ms
21,684 KB
testcase_05 AC 27 ms
23,936 KB
testcase_06 AC 25 ms
23,812 KB
testcase_07 AC 25 ms
21,940 KB
testcase_08 AC 24 ms
23,744 KB
testcase_09 AC 25 ms
23,936 KB
testcase_10 AC 25 ms
23,676 KB
testcase_11 AC 26 ms
23,940 KB
testcase_12 AC 26 ms
23,808 KB
testcase_13 AC 27 ms
23,932 KB
testcase_14 AC 27 ms
24,000 KB
testcase_15 AC 27 ms
24,064 KB
testcase_16 AC 28 ms
25,916 KB
testcase_17 AC 27 ms
23,872 KB
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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.IO;
using System.Collections.Generic;

namespace No673
{
    public class Program
    {
        void Solve(StreamScanner ss, StreamWriter sw)
        {
            //---------------------------------
            var B = ss.Next(ModInt.Parse);
            var C = ss.Next(ModInt.Parse);
            var D = ss.Next(long.Parse);

            if (C.Value == 1) sw.WriteLine(B * D);
            else sw.WriteLine(B * C * (C.Pow(D) - 1) / (C - 1));
            //---------------------------------
        }

        static void Main()
        {
            var ss = new StreamScanner(new StreamReader(Console.OpenStandardInput()));
            var sw = new StreamWriter(Console.OpenStandardOutput()) {AutoFlush = false};
            new Program().Solve(ss, sw);
            sw.Flush();
        }

        static readonly Func<string, string> String = s => s;
    }

    public struct ModInt
    {
        public static int Mod = 1000000007;

        readonly long value;
        public int Value { get { return (int)value; } }
        public ModInt Inverse { get { return GetInverse(); } }

        public ModInt(long value)
        {
            value %= Mod;
            this.value = value < 0 ? value + Mod : value;
        }

        ModInt GetInverse()
        {
            if (value == 0) throw new InvalidOperationException("value must NOT equal 0");
            return Pow(Mod - 2);
        }

        public ModInt Square()
        {
            return this * this;
        }

        public ModInt Pow(long exp)
        {
            if (exp == 0) return 1;
            if (exp % 2 == 0) return Pow(exp / 2).Square();
            return this * Pow(exp - 1);
        }

        public static ModInt Parse(string str)
        {
            return long.Parse(str);
        }

        public static implicit operator ModInt(long value)
        {
            return new ModInt(value);
        }

        public static ModInt operator +(ModInt left, ModInt right)
        {
            return left.value + right.value;
        }

        public static ModInt operator -(ModInt left, ModInt right)
        {
            return left.value - right.value;
        }

        public static ModInt operator *(ModInt left, ModInt right)
        {
            return left.value * right.value;
        }

        public static ModInt operator /(ModInt left, ModInt right)
        {
            return left * right.Inverse;
        }

        public override bool Equals(object obj)
        {
            if (!(obj is ModInt)) return false;
            return value == ((ModInt)obj).value;
        }

        public override int GetHashCode()
        {
            return value.GetHashCode();
        }

        public override string ToString()
        {
            return value.ToString();
        }
    }

    public class StreamScanner
    {
        static readonly char[] Sep = {' '};
        readonly Queue<string> buffer = new Queue<string>();
        readonly TextReader textReader;

        public StreamScanner(TextReader textReader)
        {
            this.textReader = textReader;
        }

        public T Next<T>(Func<string, T> parser)
        {
            if (buffer.Count != 0) return parser(buffer.Dequeue());
            var nextStrings = textReader.ReadLine().Split(Sep, StringSplitOptions.RemoveEmptyEntries);
            foreach (var nextString in nextStrings) buffer.Enqueue(nextString);
            return Next(parser);
        }

        public T[] Next<T>(Func<string, T> parser, int x)
        {
            var ret = new T[x];
            for (var i = 0; i < x; ++i) ret[i] = Next(parser);
            return ret;
        }

        public T[][] Next<T>(Func<string, T> parser, int x, int y)
        {
            var ret = new T[y][];
            for (var i = 0; i < y; ++i) ret[i] = Next(parser, x);
            return ret;
        }
    }
}
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