結果

問題 No.806 木を道に
ユーザー ひばちひばち
提出日時 2019-12-13 20:14:20
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 194 ms / 2,000 ms
コード長 5,181 bytes
コンパイル時間 1,388 ms
コンパイル使用メモリ 113,792 KB
実行使用メモリ 33,272 KB
最終ジャッジ日時 2024-06-27 14:33:11
合計ジャッジ時間 5,333 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 2
other AC * 27
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Runtime.CompilerServices;
using System.Text;
using static Template;
using static System.Console;
using static System.Convert;
using static System.Math;
using Pi = Pair<int, int>;
using tpDijkstra = System.Int64;
class Solver
{
Scanner sc = new Scanner();
//
List<int>[] edge;
public void Solve()
{
var N = sc.Int;
edge = Create(N, () => new List<int>());
for (var i = 0; i < N-1; i++)
{
int a, b;
sc.Make(out a, out b);
a--; b--;
edge[a].Add(b);
edge[b].Add(a);
}
WriteLine(edge.Sum(v=>Max(0,v.Count-2)));
}
}
#region Template
public class Template
{
static void Main(string[] args)
{
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });
new Solver().Solve();
Console.Out.Flush();
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool chmin<T>(ref T num, T val) where T : IComparable<T>
{ if (num.CompareTo(val) == 1) { num = val; return true; } return false; }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool chmax<T>(ref T num, T val) where T : IComparable<T>
{ if (num.CompareTo(val) == -1) { num = val; return true; } return false; }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void swap<T>(ref T v1, ref T v2)
{ var t = v2; v2 = v1; v1 = t; }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[] Create<T>(int n, Func<T> f)
{
var rt = new T[n];
for (var i = 0; i < rt.Length; ++i)
rt[i] = f();
return rt;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[] Create<T>(int n, Func<int, T> f)
{
var rt = new T[n];
for (var i = 0; i < rt.Length; ++i)
rt[i] = f(i);
return rt;
}
public static void Fail<T>(T s) { Console.WriteLine(s); Console.Out.Close(); Environment.Exit(0); }
}
public class Scanner
{
public string Str => ReadLine().Trim();
public int Int => int.Parse(Str);
public long Long => long.Parse(Str);
public double Double => double.Parse(Str);
public int[] ArrInt => Str.Split(' ').Select(int.Parse).ToArray();
public long[] ArrLong => Str.Split(' ').Select(long.Parse).ToArray();
public char[][] Grid(int n) => Create(n, () => Str.ToCharArray());
public int[] ArrInt1D(int n) => Create(n, () => Int);
public long[] ArrLong1D(int n) => Create(n, () => Long);
public int[][] ArrInt2D(int n) => Create(n, () => ArrInt);
public long[][] ArrLong2D(int n) => Create(n, () => ArrLong);
public Pair<T1, T2> PairMake<T1, T2>() => new Pair<T1, T2>(Next<T1>(), Next<T2>());
public Pair<T1, T2, T3> PairMake<T1, T2, T3>() => new Pair<T1, T2, T3>(Next<T1>(), Next<T2>(), Next<T3>());
private Queue<string> q = new Queue<string>();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public T Next<T>() { if (q.Count == 0) foreach (var item in Str.Split(' ')) q.Enqueue(item); return (T)Convert.ChangeType(q.Dequeue(), typeof(T
        )); }
public void Make<T1>(out T1 v1) => v1 = Next<T1>();
public void Make<T1, T2>(out T1 v1, out T2 v2) { v1 = Next<T1>(); v2 = Next<T2>(); }
public void Make<T1, T2, T3>(out T1 v1, out T2 v2, out T3 v3) { Make(out v1, out v2); v3 = Next<T3>(); }
public void Make<T1, T2, T3, T4>(out T1 v1, out T2 v2, out T3 v3, out T4 v4) { Make(out v1, out v2, out v3); v4 = Next<T4>(); }
public void Make<T1, T2, T3, T4, T5>(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5) { Make(out v1, out v2, out v3, out v4); v5 = Next<T5
        >(); }
public void Make<T1, T2, T3, T4, T5, T6>(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5, out T6 v6) { Make(out v1, out v2, out v3, out v4,
        out v5); v6 = Next<T6>(); }
}
public class Pair<T1, T2> : IComparable<Pair<T1, T2>>
{
public T1 v1;
public T2 v2;
public Pair() { }
public Pair(T1 v1, T2 v2)
{ this.v1 = v1; this.v2 = v2; }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public int CompareTo(Pair<T1, T2> p)
{
var c = Comparer<T1>.Default.Compare(v1, p.v1);
if (c == 0)
c = Comparer<T2>.Default.Compare(v2, p.v2);
return c;
}
public override string ToString()
=> $"{v1.ToString()} {v2.ToString()}";
public void Tie(out T1 a, out T2 b) { a = v1; b = v2; }
}
public class Pair<T1, T2, T3> : Pair<T1, T2>, IComparable<Pair<T1, T2, T3>>
{
public T3 v3;
public Pair() : base() { }
public Pair(T1 v1, T2 v2, T3 v3) : base(v1, v2)
{ this.v3 = v3; }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public int CompareTo(Pair<T1, T2, T3> p)
{
var c = base.CompareTo(p);
if (c == 0)
c = Comparer<T3>.Default.Compare(v3, p.v3);
return c;
}
public override string ToString()
=> $"{base.ToString()} {v3.ToString()}";
public void Tie(out T1 a, out T2 b, out T3 c) { Tie(out a, out b); c = v3; }
}
#endregion
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