結果
問題 | No.1212 Second Path |
ユーザー | りあん |
提出日時 | 2020-08-30 17:55:59 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 12,650 bytes |
コンパイル時間 | 3,658 ms |
コンパイル使用メモリ | 119,632 KB |
実行使用メモリ | 278,004 KB |
最終ジャッジ日時 | 2024-04-27 12:47:21 |
合計ジャッジ時間 | 15,134 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 2,115 ms
271,696 KB |
testcase_01 | TLE | - |
testcase_02 | TLE | - |
testcase_03 | TLE | - |
testcase_04 | TLE | - |
testcase_05 | TLE | - |
testcase_06 | AC | 1,605 ms
216,852 KB |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 2,074 ms
273,752 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | AC | 155 ms
31,064 KB |
testcase_24 | WA | - |
testcase_25 | AC | 166 ms
30,932 KB |
testcase_26 | WA | - |
testcase_27 | AC | 162 ms
26,848 KB |
testcase_28 | AC | 165 ms
30,568 KB |
testcase_29 | AC | 2,842 ms
273,864 KB |
testcase_30 | AC | 2,785 ms
273,608 KB |
testcase_31 | AC | 2,808 ms
278,004 KB |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | WA | - |
testcase_41 | WA | - |
testcase_42 | AC | 35 ms
26,700 KB |
testcase_43 | AC | 34 ms
26,696 KB |
testcase_44 | AC | 33 ms
26,816 KB |
testcase_45 | AC | 1,535 ms
214,332 KB |
testcase_46 | AC | 1,495 ms
214,316 KB |
testcase_47 | AC | 1,558 ms
214,908 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.Collections.Generic; using System.Linq; using System.IO; using System.Threading; using System.Text; using System.Text.RegularExpressions; using System.Diagnostics; using static util; using P = pair<int, int>; class Program { static void Main(string[] args) { var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false }; var solver = new Solver(sw); // var t = new Thread(solver.solve, 1 << 28); // 256 MB // t.Start(); // t.Join(); solver.solve(); sw.Flush(); } } class Solver { StreamWriter sw; Scan sc; void Prt(string a) => sw.WriteLine(a); void Prt<T>(IEnumerable<T> a) => Prt(string.Join(" ", a)); void Prt(params object[] a) => Prt(string.Join(" ", a)); public Solver(StreamWriter sw) { this.sw = sw; this.sc = new Scan(); } public void solve() { int n = sc.Int; var edge = new List<P>[n]; for (int i = 0; i < n; i++) { edge[i] = new List<P>(); } for (int i = 0; i < n - 1; i++) { int u, v, w; sc.Multi(out u, out v, out w); --u; --v; edge[u].Add(new P(w, v)); edge[v].Add(new P(w, u)); } var lca = new LCATree(edge); int q = sc.Int; for (int i = 0; i < q; i++) { int u, v; sc.Multi(out u, out v); --u; --v; Prt(lca.run(u, v)); } } } class pair<T, U> : IComparable<pair<T, U>> { public T v1; public U v2; public pair() : this(default(T), default(U)) {} public pair(T v1, U v2) { this.v1 = v1; this.v2 = v2; } public int CompareTo(pair<T, U> a) { int c = Comparer<T>.Default.Compare(v1, a.v1); return c != 0 ? c : Comparer<U>.Default.Compare(v2, a.v2); } public override string ToString() => v1 + " " + v2; public void Deconstruct(out T a, out U b) { a = v1; b = v2; } } static class util { public static readonly int M = 1000000007; // public static readonly int M = 998244353; public static readonly long LM = 1L << 60; public static readonly double eps = 1e-11; public static void DBG(string a) => Console.Error.WriteLine(a); public static void DBG<T>(IEnumerable<T> a) => DBG(string.Join(" ", a)); public static void DBG(params object[] a) => DBG(string.Join(" ", a)); public static void Assert(params bool[] conds) { if (conds.Any(x => !x)) throw new Exception(); } public static pair<T, U> make_pair<T, U>(T v1, U v2) => new pair<T, U>(v1, v2); public static int CompareList<T>(IList<T> a, IList<T> b) where T : IComparable<T> { for (int i = 0; i < a.Count && i < b.Count; i++) if (a[i].CompareTo(b[i]) != 0) return a[i].CompareTo(b[i]); return a.Count.CompareTo(b.Count); } public static bool inside(int i, int j, int h, int w) => i >= 0 && i < h && j >= 0 && j < w; public static readonly int[] dd = { 0, 1, 0, -1 }; // static readonly string dstring = "RDLU"; public static IEnumerable<P> adjacents(int i, int j) => Enumerable.Range(0, dd.Length).Select(k => new P(i + dd[k], j + dd[k ^ 1])); public static IEnumerable<P> adjacents(int i, int j, int h, int w) => adjacents(i, j).Where(p => inside(p.v1, p.v2, h, w)); public static IEnumerable<P> adjacents(this P p) => adjacents(p.v1, p.v2); public static IEnumerable<P> adjacents(this P p, int h, int w) => adjacents(p.v1, p.v2, h, w); public static IEnumerable<int> all_subset(this int p) { for (int i = 0; ; i = i - p & p) { yield return i; if (i == p) break; } } public static Dictionary<T, int> compress<T>(this IEnumerable<T> a) => a.Distinct().OrderBy(v => v).Select((v, i) => new { v, i }).ToDictionary(p => p.v, p => p.i); public static Dictionary<T, int> compress<T>(params IEnumerable<T>[] a) => compress(a.SelectMany(x => x)); public static T[] inv<T>(this Dictionary<T, int> dic) { var res = new T[dic.Count]; foreach (var item in dic) res[item.Value] = item.Key; return res; } public static void swap<T>(ref T a, ref T b) where T : struct { var t = a; a = b; b = t; } public static void swap<T>(this IList<T> a, int i, int j) where T : struct { var t = a[i]; a[i] = a[j]; a[j] = t; } public static T[] copy<T>(this IList<T> a) { var ret = new T[a.Count]; for (int i = 0; i < a.Count; i++) ret[i] = a[i]; return ret; } } class Scan { StreamReader sr; public Scan() { sr = new StreamReader(Console.OpenStandardInput()); } public Scan(string path) { sr = new StreamReader(path); } public int Int => int.Parse(Str); public long Long => long.Parse(Str); public double Double => double.Parse(Str); public string Str => ReadLine.Trim(); public string ReadLine => sr.ReadLine(); public pair<T, U> Pair<T, U>() { T a; U b; Multi(out a, out b); return new pair<T, U>(a, b); } public P P => Pair<int, int>(); public int[] IntArr => StrArr.Select(int.Parse).ToArray(); public long[] LongArr => StrArr.Select(long.Parse).ToArray(); public double[] DoubleArr => StrArr.Select(double.Parse).ToArray(); public string[] StrArr => Str.Split(new[]{' '}, StringSplitOptions.RemoveEmptyEntries); bool eq<T, U>() => typeof(T).Equals(typeof(U)); T ct<T, U>(U a) => (T)Convert.ChangeType(a, typeof(T)); T cv<T>(string s) => eq<T, int>() ? ct<T, int>(int.Parse(s)) : eq<T, long>() ? ct<T, long>(long.Parse(s)) : eq<T, double>() ? ct<T, double>(double.Parse(s)) : eq<T, char>() ? ct<T, char>(s[0]) : ct<T, string>(s); public void Multi<T>(out T a) => a = cv<T>(Str); public void Multi<T, U>(out T a, out U b) { var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); } public void Multi<T, U, V>(out T a, out U b, out V c) { var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]); } public void Multi<T, U, V, W>(out T a, out U b, out V c, out W d) { var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]); d = cv<W>(ar[3]); } public void Multi<T, U, V, W, X>(out T a, out U b, out V c, out W d, out X e) { var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]); d = cv<W>(ar[3]); e = cv<X>(ar[4]); } } class LCATree { int m; int[][] parents; long[][] dist; int[][] last; P[][][] mins; P INF = new P(M, -1); int[] depth; public LCATree(List<pair<int, int>>[] g, int root = 0) { int n = g.Length; parents = new int[n][]; dist = new long[n][]; depth = new int[n]; last = new int[n][]; mins = new P[n][][]; m = 1; while ((1 << m - 1) < n) ++m; for (int i = 0; i < n; i++) { parents[i] = new int[m]; dist[i] = new long[m]; last[i] = new int[m]; mins[i] = new P[m][]; depth[i] = -1; for (int j = 0; j < m; j++) { parents[i][j] = -1; dist[i][j] = 0; last[i][j] = -1; mins[i][j] = new P[]{ INF, INF }; } } for (int i = 0; i < n; i++) { P mi1 = INF; P mi2 = INF; foreach (var item in g[i]) { if (mi1.v1 > item.v1) { mi2 = mi1; mi1 = item; } else if (mi2.v1 > item.v1) { mi2 = item; } } mins[i][0] = new P[]{ mi1, mi2 }; } depth[root] = 0; var q = new Queue<int>(); q.Enqueue(root); while (q.Count > 0) { var p = q.Dequeue(); foreach (var item in g[p]) { if (depth[item.v2] == -1) { depth[item.v2] = depth[p] + 1; parents[item.v2][0] = p; last[item.v2][0] = item.v2; dist[item.v2][0] = item.v1; for (int i = 1; i < m && parents[item.v2][i - 1] != -1; i++) { parents[item.v2][i] = parents[parents[item.v2][i - 1]][i - 1]; dist[item.v2][i] = dist[item.v2][i - 1] + dist[parents[item.v2][i - 1]][i - 1]; last[item.v2][i] = last[parents[item.v2][i - 1]][i - 1]; P mi1 = INF; P mi2 = INF; foreach (var mi in mins[item.v2][i - 1]) { if (mi.v2 == parents[item.v2][i - 1]) continue; if (mi1.v1 > mi.v1) { mi2 = mi1; mi1 = mi; } else if (mi2.v1 > mi.v1) { mi2 = mi; } } foreach (var mi in mins[parents[item.v2][i - 1]][i - 1]) { if (mi.v2 == last[item.v2][i - 1]) continue; if (mi1.v1 > mi.v1) { mi2 = mi1; mi1 = mi; } else if (mi2.v1 > mi.v1) { mi2 = mi; } } mins[item.v2][i] = new P[]{ mi1, mi2 }; } q.Enqueue(item.v2); } } } } void climb(ref int p, int cnt) { for (int i = m - 1; i >= 0 ; i--) { if (((cnt >> i) & 1) == 1) { p = parents[p][i]; } } } long climb(ref int p, ref P[] mis, ref int las, int cnt) { long dis = 0; for (int i = m - 1; i >= 0 ; i--) { if (((cnt >> i) & 1) == 1) { dis += dist[p][i]; P mi1 = INF; P mi2 = INF; foreach (var mi in mis) { if (mi.v2 == p) continue; if (mi1.v1 > mi.v1) { mi2 = mi1; mi1 = mi; } else if (mi2.v1 > mi.v1) { mi2 = mi; } } foreach (var mi in mins[p][i]) { if (mi.v2 == las) continue; if (mi1.v1 > mi.v1) { mi2 = mi1; mi1 = mi; } else if (mi2.v1 > mi.v1) { mi2 = mi; } } mis = new P[]{ mi1, mi2 }; las = last[p][i]; p = parents[p][i]; } } return dis; } public long run(int p, int q) { int lca = getlca(p, q); var mip = new P[]{ INF, INF }; int lasp = -1; var miq = new P[]{ INF, INF }; int lasq = -1; long dist = 0; dist += climb(ref p, ref mip, ref lasp, depth[p] - depth[lca]); dist += climb(ref q, ref miq, ref lasq, depth[q] - depth[lca]); int min = M; foreach (var mi in mip) { if (mi.v2 == lca || mi.v2 == lasq) continue; min = Math.Min(min, mi.v1); } foreach (var mi in miq) { if (mi.v2 == lca || mi.v2 == lasp) continue; min = Math.Min(min, mi.v1); } foreach (var mi in mins[lca][0]) { if (mi.v2 == lasq || mi.v2 == lasp) continue; min = Math.Min(min, mi.v1); } if (min == M) return -1; return dist + min * 2; } int getlca(int p, int q) { if (depth[p] > depth[q]) climb(ref p, depth[p] - depth[q]); if (depth[p] < depth[q]) climb(ref q, depth[q] - depth[p]); if (p == q) return p; for (int i = m - 1; i >= 0 ; i--) { if (parents[p][i] != parents[q][i]) { p = parents[p][i]; q = parents[q][i]; } } { p = parents[p][0]; q = parents[q][0]; } return p; } }