結果
問題 | No.53 悪の漸化式 |
ユーザー | nanophoto12 |
提出日時 | 2014-10-31 01:03:19 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 25 ms / 5,000 ms |
コード長 | 3,392 bytes |
コンパイル時間 | 1,035 ms |
コンパイル使用メモリ | 115,264 KB |
実行使用メモリ | 26,404 KB |
最終ジャッジ日時 | 2024-06-09 18:04:40 |
合計ジャッジ時間 | 1,905 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(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 | 22 ms
26,272 KB |
testcase_01 | AC | 21 ms
24,052 KB |
testcase_02 | AC | 24 ms
26,404 KB |
testcase_03 | AC | 22 ms
24,044 KB |
testcase_04 | AC | 23 ms
24,496 KB |
testcase_05 | AC | 23 ms
26,336 KB |
testcase_06 | AC | 23 ms
21,944 KB |
testcase_07 | AC | 23 ms
24,244 KB |
testcase_08 | AC | 25 ms
24,308 KB |
testcase_09 | AC | 25 ms
26,292 KB |
testcase_10 | AC | 25 ms
26,160 KB |
testcase_11 | AC | 24 ms
24,048 KB |
testcase_12 | AC | 24 ms
22,196 KB |
testcase_13 | AC | 25 ms
24,384 KB |
testcase_14 | AC | 24 ms
24,308 KB |
testcase_15 | AC | 24 ms
24,048 KB |
testcase_16 | AC | 24 ms
26,156 KB |
testcase_17 | AC | 24 ms
23,984 KB |
testcase_18 | AC | 23 ms
24,044 KB |
testcase_19 | AC | 24 ms
26,292 KB |
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
using System; using System.Globalization; using System.Text; class Program { internal class BigInt { private static readonly int _size = 56; private static readonly int _decimalDigits = _size - 2; private readonly int[] _buffer = new int[_size]; private static readonly int _upThreshold = 100000000; public BigInt(int source) { _buffer[_decimalDigits] = source; } public BigInt(BigInt source) { Array.Copy(source._buffer, _buffer, _buffer.Length); } public override string ToString() { var buider = new StringBuilder(); for (int i = _buffer.Length - 1; i >= _decimalDigits; i--) { if (_buffer[i] != 0) { buider.Append(_buffer[i].ToString(CultureInfo.InvariantCulture)); } } if (buider.Length == 0) { buider.Append("0."); } else { buider.Append("."); } for (int i = _decimalDigits-1; i >= _decimalDigits - 5; i--) { buider.Append(_buffer[i].ToString("00000000")); } return buider.ToString(); } public BigInt Mul(int value) { var newInt = new BigInt(this); var up = 0; for (int i = 0; i < _size; i++) { newInt._buffer[i] *= value; newInt._buffer[i] += up; if (newInt._buffer[i] >= 1e8) { up = newInt._buffer[i]/_upThreshold; newInt._buffer[i] %= _upThreshold; } else { up = 0; } } return newInt; } public BigInt Subtract(BigInt value) { var newInt = new BigInt(this); for (int i = 0; i < _size; i++) { newInt._buffer[i] -= value._buffer[i]; if (newInt._buffer[i] < 0) { newInt._buffer[i] += _upThreshold; newInt._buffer[i + 1] -= 1; } } return newInt; } public BigInt Divide(int value) { var newInt = new BigInt(this); for (int i = 0; i < _size; i++) { var down = newInt._buffer[i] % value; if (down > 0) { newInt._buffer[i - 1] += _upThreshold*down/value; } newInt._buffer[i] /= value; } return newInt; } } public static void Main(string[] args) { int n = int.Parse(Console.ReadLine()); BigInt[] bigInts = new BigInt[101]; bigInts[0] = new BigInt(4); bigInts[1] = new BigInt(3); for (int i = 2; i <= n; i++) { bigInts[i] = bigInts[i - 1].Mul(19).Subtract(bigInts[i - 2].Mul(12)); bigInts[i] = bigInts[i].Divide(4); } Console.WriteLine(bigInts[n].ToString()); } }