結果
問題 | No.196 典型DP (1) |
ユーザー | eitaho |
提出日時 | 2015-06-12 18:02:21 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 137 ms / 2,000 ms |
コード長 | 3,109 bytes |
コンパイル時間 | 1,005 ms |
コンパイル使用メモリ | 116,864 KB |
実行使用メモリ | 63,208 KB |
最終ジャッジ日時 | 2024-07-06 15:52:10 |
合計ジャッジ時間 | 5,856 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 33 ms
25,016 KB |
testcase_01 | AC | 33 ms
23,220 KB |
testcase_02 | AC | 34 ms
25,468 KB |
testcase_03 | AC | 34 ms
25,152 KB |
testcase_04 | AC | 34 ms
25,140 KB |
testcase_05 | AC | 34 ms
29,444 KB |
testcase_06 | AC | 34 ms
25,360 KB |
testcase_07 | AC | 34 ms
27,060 KB |
testcase_08 | AC | 33 ms
25,396 KB |
testcase_09 | AC | 34 ms
25,388 KB |
testcase_10 | AC | 33 ms
25,400 KB |
testcase_11 | AC | 34 ms
27,148 KB |
testcase_12 | AC | 33 ms
25,140 KB |
testcase_13 | AC | 35 ms
27,412 KB |
testcase_14 | AC | 34 ms
25,364 KB |
testcase_15 | AC | 36 ms
25,272 KB |
testcase_16 | AC | 45 ms
33,312 KB |
testcase_17 | AC | 54 ms
33,744 KB |
testcase_18 | AC | 70 ms
41,940 KB |
testcase_19 | AC | 78 ms
43,240 KB |
testcase_20 | AC | 93 ms
48,844 KB |
testcase_21 | AC | 96 ms
51,128 KB |
testcase_22 | AC | 94 ms
50,748 KB |
testcase_23 | AC | 110 ms
50,668 KB |
testcase_24 | AC | 106 ms
53,744 KB |
testcase_25 | AC | 106 ms
53,848 KB |
testcase_26 | AC | 135 ms
58,864 KB |
testcase_27 | AC | 136 ms
63,208 KB |
testcase_28 | AC | 136 ms
61,028 KB |
testcase_29 | AC | 134 ms
59,108 KB |
testcase_30 | AC | 134 ms
56,820 KB |
testcase_31 | AC | 135 ms
52,668 KB |
testcase_32 | AC | 137 ms
53,192 KB |
testcase_33 | AC | 133 ms
52,924 KB |
testcase_34 | AC | 133 ms
52,936 KB |
testcase_35 | AC | 133 ms
53,052 KB |
testcase_36 | AC | 129 ms
51,012 KB |
testcase_37 | AC | 96 ms
50,880 KB |
testcase_38 | AC | 129 ms
53,064 KB |
testcase_39 | AC | 122 ms
52,928 KB |
testcase_40 | AC | 132 ms
53,052 KB |
testcase_41 | AC | 33 ms
25,404 KB |
testcase_42 | AC | 33 ms
25,492 KB |
testcase_43 | AC | 33 ms
27,320 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.IO; using System.Linq; using System.Text; using System.Collections.Generic; using System.Diagnostics; using System.Numerics; using Enu = System.Linq.Enumerable; class Program { static readonly int Mod = (int)1e9 + 7; int N, K; List<int>[] G; int[][] Count; int[] Size; public void Solve() { N = Reader.Int(); K = Reader.Int(); G = Enu.Range(0, N).Select(i => new List<int>()).ToArray(); foreach (var e in Reader.IntTable(N - 1)) { G[e[0]].Add(e[1]); G[e[1]].Add(e[0]); } Count = new int[N][]; Size = new int[N]; Rec(0, -1); Console.WriteLine(Count[0][K]); } void Rec(int v, int prev) { if (Count[v] != null) return; Count[v] = new int[N + 1]; Count[v][0] = 1; Size[v] = 1; foreach (int child in G[v]) if (child != prev) { Rec(child, v); int[] next = new int[N + 1]; for (int a = 0; a <= Size[v]; a++) for (int b = 0; b <= Size[child]; b++) next[a + b] = (int)((next[a + b] + (long)Count[v][a] * Count[child][b]) % Mod); Count[v] = next; Size[v] += Size[child]; } Count[v][Size[v]] = 1; } } 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 => Line()).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; } }