結果
問題 | No.660 家を通り過ぎないランダムウォーク問題 |
ユーザー |
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提出日時 | 2018-03-03 00:17:35 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 94 ms / 2,000 ms |
コード長 | 5,801 bytes |
コンパイル時間 | 3,458 ms |
コンパイル使用メモリ | 110,968 KB |
実行使用メモリ | 29,868 KB |
最終ジャッジ日時 | 2023-09-05 04:24:08 |
合計ジャッジ時間 | 8,920 ms |
ジャッジサーバーID (参考情報) |
judge11 / judge14 |
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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 | 58 ms
22,868 KB |
testcase_01 | AC | 59 ms
22,796 KB |
testcase_02 | AC | 59 ms
24,784 KB |
testcase_03 | AC | 58 ms
24,820 KB |
testcase_04 | AC | 58 ms
24,868 KB |
testcase_05 | AC | 57 ms
24,928 KB |
testcase_06 | AC | 59 ms
22,960 KB |
testcase_07 | AC | 60 ms
22,816 KB |
testcase_08 | AC | 57 ms
22,876 KB |
testcase_09 | AC | 58 ms
24,908 KB |
testcase_10 | AC | 57 ms
24,792 KB |
testcase_11 | AC | 58 ms
22,780 KB |
testcase_12 | AC | 58 ms
22,924 KB |
testcase_13 | AC | 58 ms
24,896 KB |
testcase_14 | AC | 58 ms
24,948 KB |
testcase_15 | AC | 58 ms
24,860 KB |
testcase_16 | AC | 58 ms
20,820 KB |
testcase_17 | AC | 58 ms
20,948 KB |
testcase_18 | AC | 58 ms
22,856 KB |
testcase_19 | AC | 58 ms
22,816 KB |
testcase_20 | AC | 58 ms
24,896 KB |
testcase_21 | AC | 58 ms
22,856 KB |
testcase_22 | AC | 59 ms
24,796 KB |
testcase_23 | AC | 58 ms
24,740 KB |
testcase_24 | AC | 59 ms
24,924 KB |
testcase_25 | AC | 59 ms
22,760 KB |
testcase_26 | AC | 59 ms
24,820 KB |
testcase_27 | AC | 58 ms
20,776 KB |
testcase_28 | AC | 59 ms
24,916 KB |
testcase_29 | AC | 59 ms
24,872 KB |
testcase_30 | AC | 59 ms
22,960 KB |
testcase_31 | AC | 60 ms
22,808 KB |
testcase_32 | AC | 60 ms
24,784 KB |
testcase_33 | AC | 60 ms
22,716 KB |
testcase_34 | AC | 61 ms
22,920 KB |
testcase_35 | AC | 64 ms
23,200 KB |
testcase_36 | AC | 64 ms
25,284 KB |
testcase_37 | AC | 65 ms
23,160 KB |
testcase_38 | AC | 73 ms
24,924 KB |
testcase_39 | AC | 73 ms
23,000 KB |
testcase_40 | AC | 75 ms
25,100 KB |
testcase_41 | AC | 85 ms
29,024 KB |
testcase_42 | AC | 85 ms
29,036 KB |
testcase_43 | AC | 90 ms
29,868 KB |
testcase_44 | AC | 94 ms
28,532 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.Linq; using System.Collections.Generic; using Debug = System.Diagnostics.Debug; using SB = System.Text.StringBuilder; using Number = System.Int64; namespace Program { public class Solver { Random rnd = new Random(0); public void Solve() { var n = ri; ModInt ans = 0; var binom = new BinomialCoefficient(2 * n + 5); for (int i = 0; i <= n; i++) { var N = n + i; var k = i; if (N + k > 2 * n) break; N--; ModInt v = binom.fact[N + k]; v *= (N - k + 1); v *= binom.ifact[k]; v *= binom.ifact[N + 1]; Debug.WriteLine(v); ans += v; } Console.WriteLine(ans); } const long INF = 1L << 60; static int[] dx = { -1, 0, 1, 0 }; static int[] dy = { 0, 1, 0, -1 }; int ri { get { return sc.Integer(); } } long rl { get { return sc.Long(); } } double rd { get { return sc.Double(); } } string rs { get { return sc.Scan(); } } public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput()); static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; } static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; } } } #region main static class Ex { static public string AsString(this IEnumerable<char> ie) { return new string(ie.ToArray()); } static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); } static public void Main() { Console.SetOut(new Program.IO.Printer(Console.OpenStandardOutput()) { AutoFlush = true }); var solver = new Program.Solver(); try { solver.Solve(); Console.Out.Flush(); } catch { } } } #endregion #region Ex namespace Program.IO { using System.IO; using System.Text; using System.Globalization; public class Printer: StreamWriter { public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } } public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { } } public class StreamScanner { public StreamScanner(Stream stream) { str = stream; } public readonly Stream str; private readonly byte[] buf = new byte[1024]; private int len, ptr; public bool isEof = false; public bool IsEndOfStream { get { return isEof; } } private byte read() { if (isEof) return 0; if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } } return buf[ptr++]; } public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; } public string Scan() { var sb = new StringBuilder(); for (var b = Char(); b >= 33 && b <= 126; b = (char)read()) sb.Append(b); return sb.ToString(); } public string ScanLine() { var sb = new StringBuilder(); for (var b = Char(); b != '\n' && b != 0; b = (char)read()) if (b != '\r') sb.Append(b); return sb.ToString(); } public long Long() { return isEof ? long.MinValue : long.Parse(Scan()); } public int Integer() { return isEof ? int.MinValue : int.Parse(Scan()); } public double Double() { return isEof ? double.NaN : double.Parse(Scan(), CultureInfo.InvariantCulture); } } } #endregion #region ModInt public struct ModInt { public const long Mod = (int)1e9 + 7; public long num; public ModInt(long n) { num = n; } public override string ToString() { return num.ToString(); } public static ModInt operator +(ModInt l, ModInt r) { l.num += r.num; if (l.num >= Mod) l.num -= Mod; return l; } public static ModInt operator -(ModInt l, ModInt r) { l.num -= r.num; if (l.num < 0) l.num += Mod; return l; } public static ModInt operator *(ModInt l, ModInt r) { return new ModInt(l.num * r.num % Mod); } public static implicit operator ModInt(long n) { n %= Mod; if (n < 0) n += Mod; return new ModInt(n); } public static ModInt Pow(ModInt v, long k) { return Pow(v.num, k); } public static ModInt Pow(long v, long k) { long ret = 1; for (k %= Mod - 1; k > 0; k >>= 1, v = v * v % Mod) if ((k & 1) == 1) ret = ret * v % Mod; return new ModInt(ret); } public static ModInt Inverse(ModInt v) { return Pow(v, Mod - 2); } } #endregion #region Binomial Coefficient public class BinomialCoefficient { public ModInt[] fact, ifact; public BinomialCoefficient(int n) { fact = new ModInt[n + 1]; ifact = new ModInt[n + 1]; fact[0] = 1; for (int i = 1; i <= n; i++) fact[i] = fact[i - 1] * i; ifact[n] = ModInt.Inverse(fact[n]); for (int i = n - 1; i >= 0; i--) ifact[i] = ifact[i + 1] * (i + 1); ifact[0] = ifact[1]; } public ModInt this[int n, int r] { get { if (n < 0 || n >= fact.Length || r < 0 || r > n) return 0; return fact[n] * ifact[n - r] * ifact[r]; } } public ModInt RepeatedCombination(int n, int k) { if (k == 0) return 1; return this[n + k - 1, k]; } } #endregion