結果
| 問題 |
No.584 赤、緑、青の色塗り
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2017-10-28 22:16:42 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 204 ms / 2,000 ms |
| コード長 | 3,429 bytes |
| コンパイル時間 | 1,238 ms |
| コンパイル使用メモリ | 109,056 KB |
| 実行使用メモリ | 63,488 KB |
| 最終ジャッジ日時 | 2024-11-22 04:28:42 |
| 合計ジャッジ時間 | 3,456 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 6 |
| other | AC * 14 |
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;
public class Program
{
static readonly int Mod = (int)1e9 + 7;
public void Solve()
{
int N = Reader.Int(), R = Reader.Int(), G = Reader.Int(), B = Reader.Int();
int S = R + G + B;
var C = ModC(N + 1, Mod);
long ans = 0;
for (int two = 0, one = S; two * 2 <= Math.Min(S, N); two++, one -= 2)
{
int remEmpty = N - 2 * two - one - (two + one - 1);
if (remEmpty < 0) continue;
long seat = C[two + one, two] * C[two + one + remEmpty, remEmpty] % Mod;
for (int pairRed = 0; pairRed <= Math.Min(R, two); pairRed++)
{
int pairGB = two - pairRed, oneGB = one - (R - pairRed);
if (Math.Min(G, B) < pairGB) continue;
long num = seat * (long)BigInteger.ModPow(2, two, Mod) % Mod;
num = num * C[two, pairRed] % Mod * C[one, R - pairRed] % Mod;
num = num * C[pairRed + oneGB, G - pairGB] % Mod;
ans += num;
}
}
Console.WriteLine(ans % Mod);
}
static long[,] ModC(int max, long mod)
{
var c = new long[max + 1, max + 1];
for (int n = 0; n <= max; n++)
{
c[n, 0] = c[n, n] = 1;
for (int k = 1; k < n; k++)
c[n, k] = (c[n - 1, k] + c[n - 1, k - 1]) % mod;
}
return c;
}
}
class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
static TextReader reader = Console.In;
static readonly char[] separator = { ' ' };
static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
static string[] A = new string[0];
static int i;
static void Init() { Dispose(); A = new string[0]; }
public static void Set(TextReader r) { Init(); reader = r; }
public static void Set(string file) { Init(); reader = new StreamReader(file); }
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 Range(N, Int); }
public static int[][] IntTable(int H) { return Range(H, IntLine); }
public static string[] StringArray(int N) { return Range(N, Next); }
public static string[][] StringTable(int N) { return Range(N, () => Split(Line())); }
public static string Line() { return reader.ReadLine().Trim(); }
public static T[] Range<T>(int N, Func<T> f) { var r = new T[N]; for (int i = 0; i < N; r[i++] = f()) ; return r; }
public static void Dispose() { reader.Dispose(); }
static string[] Split(string s) { return s.Split(separator, op); }
static string Next() { CheckNext(); return A[i++]; }
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;
}
}
eitaho