結果
問題 | No.439 チワワのなる木 |
ユーザー | eitaho |
提出日時 | 2016-10-29 01:34:58 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 341 ms / 5,000 ms |
コード長 | 4,174 bytes |
コンパイル時間 | 1,047 ms |
コンパイル使用メモリ | 110,336 KB |
実行使用メモリ | 72,440 KB |
最終ジャッジ日時 | 2024-05-03 08:35:57 |
合計ジャッジ時間 | 4,305 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | 30 ms
19,328 KB |
testcase_01 | AC | 31 ms
19,456 KB |
testcase_02 | AC | 31 ms
19,200 KB |
testcase_03 | AC | 29 ms
19,328 KB |
testcase_04 | AC | 29 ms
19,072 KB |
testcase_05 | AC | 33 ms
19,200 KB |
testcase_06 | AC | 31 ms
18,816 KB |
testcase_07 | AC | 29 ms
19,328 KB |
testcase_08 | AC | 31 ms
19,200 KB |
testcase_09 | AC | 30 ms
19,200 KB |
testcase_10 | AC | 30 ms
19,328 KB |
testcase_11 | AC | 29 ms
19,200 KB |
testcase_12 | AC | 31 ms
19,328 KB |
testcase_13 | AC | 31 ms
19,328 KB |
testcase_14 | AC | 31 ms
19,584 KB |
testcase_15 | AC | 30 ms
19,712 KB |
testcase_16 | AC | 32 ms
19,968 KB |
testcase_17 | AC | 32 ms
19,456 KB |
testcase_18 | AC | 160 ms
38,260 KB |
testcase_19 | AC | 158 ms
38,516 KB |
testcase_20 | AC | 226 ms
46,636 KB |
testcase_21 | AC | 77 ms
28,800 KB |
testcase_22 | AC | 72 ms
29,184 KB |
testcase_23 | AC | 253 ms
50,284 KB |
testcase_24 | AC | 341 ms
69,624 KB |
testcase_25 | AC | 218 ms
46,000 KB |
testcase_26 | AC | 213 ms
46,976 KB |
testcase_27 | AC | 227 ms
72,440 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.Text.RegularExpressions; using System.Collections.Generic; using System.Diagnostics; using Enu = System.Linq.Enumerable; using System.Numerics; public class Program { long ans = 0; int[] Val; List<int>[] G; public void Solve() { int N = Reader.Int(); Val = Reader.String().Select(c => c == 'c' ? 0 : 1).ToArray(); G = Enu.Range(0, N).Select(i => new List<int>()).ToArray(); for (int i = 0; i < N - 1; i++) { int a = Reader.Int() - 1, b = Reader.Int() - 1; G[a].Add(b); G[b].Add(a); } var who = new List<int>(); var pos = new List<int>[N]; for (int i = 0; i < N; i++) pos[i] = new List<int>(); Rec(0, -1, G, Val, who, pos); long totalA = Val.Count(c => c == 0); long totalB = N - totalA; var As = new long[who.Count]; var Bs = new long[who.Count]; for (int i = 0; i < who.Count; i++) if (i == pos[who[i]][0]) if (Val[who[i]] == 0) As[i]++; else Bs[i]++; for (int i = 1; i < As.Length; i++) { As[i] += As[i - 1]; Bs[i] += Bs[i - 1]; } for (int root = 0; root < N; root++) if (Val[root] == 1) { long remA = totalA, remB = totalB - 1, curr = 0; for (int i = 0; i + 1 < pos[root].Count; i++) { int L = pos[root][i], R = pos[root][i + 1] - 1; long a = As[R] - As[L]; long b = Bs[R] - Bs[L]; curr += a * (totalB - 1 - b); curr += b * (totalA - a); remA -= a; remB -= b; } curr += remA * (totalB - 1 - remB); curr += remB * (totalA - remA); ans += curr / 2; } Console.WriteLine(ans); Console.ReadLine(); } void Rec(int a, int prev, List<int>[] G, int[] Val, List<int> who, List<int>[] positions) { positions[a].Add(who.Count); who.Add(a); foreach (int b in G[a]) if (b != prev) { Rec(b, a, G, Val, who, positions); positions[a].Add(who.Count); who.Add(a); } } } 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() { 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 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(); } static string[] Split(string s) { return s.Split(separator, op); } 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; } 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; } }