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 | 167 ms / 2,000 ms |
コード長 | 3,109 bytes |
コンパイル時間 | 4,390 ms |
コンパイル使用メモリ | 109,472 KB |
実行使用メモリ | 57,760 KB |
最終ジャッジ日時 | 2023-09-20 21:04:08 |
合計ジャッジ時間 | 9,575 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge15 |
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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 | 65 ms
23,804 KB |
testcase_01 | AC | 64 ms
23,720 KB |
testcase_02 | AC | 64 ms
21,692 KB |
testcase_03 | AC | 64 ms
21,848 KB |
testcase_04 | AC | 64 ms
21,828 KB |
testcase_05 | AC | 64 ms
21,696 KB |
testcase_06 | AC | 64 ms
21,644 KB |
testcase_07 | AC | 64 ms
23,836 KB |
testcase_08 | AC | 63 ms
21,736 KB |
testcase_09 | AC | 64 ms
21,832 KB |
testcase_10 | AC | 66 ms
21,640 KB |
testcase_11 | AC | 65 ms
21,736 KB |
testcase_12 | AC | 65 ms
21,780 KB |
testcase_13 | AC | 65 ms
23,684 KB |
testcase_14 | AC | 66 ms
23,668 KB |
testcase_15 | AC | 68 ms
23,772 KB |
testcase_16 | AC | 76 ms
30,096 KB |
testcase_17 | AC | 84 ms
30,540 KB |
testcase_18 | AC | 100 ms
38,432 KB |
testcase_19 | AC | 109 ms
37,836 KB |
testcase_20 | AC | 125 ms
47,600 KB |
testcase_21 | AC | 124 ms
49,692 KB |
testcase_22 | AC | 126 ms
49,708 KB |
testcase_23 | AC | 141 ms
49,364 KB |
testcase_24 | AC | 135 ms
48,292 KB |
testcase_25 | AC | 134 ms
48,680 KB |
testcase_26 | AC | 167 ms
57,760 KB |
testcase_27 | AC | 165 ms
55,616 KB |
testcase_28 | AC | 164 ms
55,616 KB |
testcase_29 | AC | 163 ms
53,572 KB |
testcase_30 | AC | 163 ms
55,660 KB |
testcase_31 | AC | 163 ms
47,716 KB |
testcase_32 | AC | 164 ms
47,612 KB |
testcase_33 | AC | 164 ms
47,616 KB |
testcase_34 | AC | 164 ms
47,628 KB |
testcase_35 | AC | 162 ms
45,628 KB |
testcase_36 | AC | 159 ms
47,628 KB |
testcase_37 | AC | 131 ms
47,656 KB |
testcase_38 | AC | 160 ms
47,664 KB |
testcase_39 | AC | 152 ms
47,624 KB |
testcase_40 | AC | 161 ms
49,624 KB |
testcase_41 | AC | 64 ms
19,684 KB |
testcase_42 | AC | 65 ms
21,784 KB |
testcase_43 | AC | 65 ms
21,708 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; } }