結果
問題 | No.319 happy b1rthday 2 me |
ユーザー |
![]() |
提出日時 | 2016-01-08 17:46:26 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 32 ms / 2,000 ms |
コード長 | 3,931 bytes |
コンパイル時間 | 4,759 ms |
コンパイル使用メモリ | 109,312 KB |
実行使用メモリ | 19,328 KB |
最終ジャッジ日時 | 2024-09-19 13:09:38 |
合計ジャッジ時間 | 2,977 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 29 |
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.IO;using System.Linq;using System.Text;using System.Collections.Generic;using System.Diagnostics;using System.Numerics;using Enu = System.Linq.Enumerable;class Program{public void Solve(){string A = Reader.String(), B = Reader.String();long ans = Count(B);ans -= Count((long.Parse(A) - 1) + "");if ((long.Parse(A) - 1).ToString().Last() == '1' && A[0] == '2') ans--;Console.WriteLine(ans);}private long Count(string S){var A = S.Select(c => c - '0').ToArray();int len = A.Length;long res = 0;var dp = new long[len + 1, 2, 10, 10, len]; // index, smaller, firstDigit, lastDigit, countdp[0, 0, 0, 0, 0] = 1;for (int i = 0; i < len; i++)for (int smaller = 0; smaller < 2; smaller++)for (int first = 0; first <= 9; first++)for (int last = 0; last <= 9; last++)for (int used = 0; used < len; used++){long nums = dp[i, smaller, first, last, used];if (nums == 0) continue;for (int d = 0; d <= 9; d++){if (smaller == 0 && d > A[i]) continue;int nextSmaller = smaller | (d < A[i] ? 1 : 0);int nextFirst = (first > 0) ? first : d;int nextUsed = used + (last == 1 && d == 2 ? 1 : 0);dp[i + 1, nextSmaller, nextFirst, d, nextUsed] += nums;if (i == len - 1 && nextSmaller == 1 && first == 2 && d == 1)res += nums;}}for (int used = 1; used < len; used++)for (int first = 0; first <= 9; first++)for (int last = 0; last <= 9; last++)res += used * (dp[len, 0, first, last, used] + dp[len, 1, first, last, used]);if (long.Parse(S) >= 2) res++; // 1->2return res;}}class Entry { static void Main() { new Program().Solve(); } }class Reader{private static TextReader reader = Console.In;private static readonly char[] separator = { ' ' };private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;private static string[] A = new string[0];private static int i;private static void Init() { A = new string[0]; }public static void Set(TextReader r) { reader = r; Init(); }public static void Set(string file) { reader = new StreamReader(file); Init(); }public static bool HasNext() { return CheckNext(); }public static string String() { return Next(); }public static int Int() { return int.Parse(Next()); }public static long Long() { return long.Parse(Next()); }public static double Double() { return double.Parse(Next()); }public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Next()).ToArray(); }public static string Line() { return reader.ReadLine().Trim(); }private static string[] Split(string s) { return s.Split(separator, op); }private static string Next() { CheckNext(); return A[i++]; }private static bool CheckNext(){if (i < A.Length) return true;string line = reader.ReadLine();if (line == null) return false;if (line == "") return CheckNext();A = Split(line);i = 0;return true;}}