結果

問題 No.507 ゲーム大会(チーム決め)
ユーザー 紙ぺーぱー紙ぺーぱー
提出日時 2017-04-23 17:41:02
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 1,721 ms / 3,000 ms
コード長 18,475 bytes
コンパイル時間 1,279 ms
コンパイル使用メモリ 121,472 KB
実行使用メモリ 51,404 KB
最終ジャッジ日時 2024-07-22 07:51:29
合計ジャッジ時間 19,373 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
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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 28 ms
17,664 KB
testcase_01 AC 28 ms
17,664 KB
testcase_02 AC 28 ms
17,792 KB
testcase_03 AC 27 ms
17,792 KB
testcase_04 AC 27 ms
17,664 KB
testcase_05 AC 27 ms
17,536 KB
testcase_06 AC 25 ms
17,664 KB
testcase_07 AC 1,686 ms
51,392 KB
testcase_08 AC 1,525 ms
51,400 KB
testcase_09 AC 1,713 ms
51,384 KB
testcase_10 AC 1,612 ms
51,404 KB
testcase_11 AC 1,514 ms
51,404 KB
testcase_12 AC 1,721 ms
51,272 KB
testcase_13 AC 1,564 ms
51,400 KB
testcase_14 AC 1,571 ms
51,276 KB
testcase_15 AC 1,564 ms
51,268 KB
testcase_16 AC 1,560 ms
51,268 KB
testcase_17 AC 28 ms
17,664 KB
testcase_18 AC 28 ms
17,792 KB
testcase_19 AC 27 ms
17,536 KB
testcase_20 AC 28 ms
17,792 KB
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.Linq;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using Number = System.Int16;
namespace Program
{
public class Solver
{
public void Solve()
{
var n = sc.Integer();
var k = sc.Integer();
var u = sc.Long();
var a = sc.Long(n - 1);
Array.Sort(a);
var ok = false;
var l = 0; var r = n - 1;
for (int _ = 0; _ < 18; _++)
{
var m = (l + r) / 2;
var v = u + a[m];
var s = new Set<long>();
s.IsMultiSet = true;
for (int i = n - 2; i >= 0; i--)
if (i != m) s.Add(a[i]);
var cnt = 0;
while (s.Count >= 2)
{
var min = s[0];
s.RemoveAt(0);
var lb = s.UpperBound(v - min);
if (lb < s.Count)
{
cnt++;
s.RemoveAt(lb);
}
}
if (cnt < k) { ok = true; r = m; }
else l = m;
}
if (!ok) IO.Printer.Out.WriteLine(-1);
else IO.Printer.Out.WriteLine(a[r]);
}
public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }
static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
}
}
#region main
static class Ex
{
static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }
static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }
static public void Main()
{
var solver = new Program.Solver();
solver.Solve();
Program.IO.Printer.Out.Flush();
}
}
#endregion
#region Ex
namespace Program.IO
{
using System.IO;
using System.Text;
using System.Globalization;
public class Printer: StreamWriter
{
static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }
public static Printer Out { get; set; }
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }
public void Write<T>(string format, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
public void WriteLine<T>(string format, T[] source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
public readonly Stream str;
private readonly byte[] buf = new byte[1024];
private int len, ptr;
public bool isEof = false;
public bool IsEndOfStream { get { return isEof; } }
private byte read()
{
if (isEof) return 0;
if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }
return buf[ptr++];
}
public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }
public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
sb.Append(b);
return sb.ToString();
}
public string ScanLine()
{
var sb = new StringBuilder();
for (var b = Char(); b != '\n'; b = (char)read())
if (b == 0) break;
else if (b != '\r') sb.Append(b);
return sb.ToString();
}
public long Long()
{
if (isEof) return long.MinValue;
long ret = 0; byte b = 0; var ng = false;
do b = read();
while (b != 0 && b != '-' && (b < '0' || '9' < b));
if (b == 0) return long.MinValue;
if (b == '-') { ng = true; b = read(); }
for (; true; b = read())
{
if (b < '0' || '9' < b)
return ng ? -ret : ret;
else ret = ret * 10 + b - '0';
}
}
public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }
public double Double() { var s = Scan(); return s != "" ? double.Parse(s, CultureInfo.InvariantCulture) : double.NaN; }
private T[] enumerate<T>(int n, Func<T> f)
{
var a = new T[n];
for (int i = 0; i < n; ++i) a[i] = f();
return a;
}
public char[] Char(int n) { return enumerate(n, Char); }
public string[] Scan(int n) { return enumerate(n, Scan); }
public double[] Double(int n) { return enumerate(n, Double); }
public int[] Integer(int n) { return enumerate(n, Integer); }
public long[] Long(int n) { return enumerate(n, Long); }
}
}
#endregion
#region Compair
static public class Pair
{
static public Pair<FT, ST> Create<FT, ST>(FT f, ST s) where FT : IComparable<FT> where ST : IComparable<ST>
{
return new Pair<FT, ST>(f, s);
}
static public Pair<FT, ST> Min<FT, ST>(Pair<FT, ST> p, Pair<FT, ST> q) where FT : IComparable<FT> where ST : IComparable<ST>
{
return (p.CompareTo(q) <= 0) ? p : q;
}
static public Pair<FT, ST> Max<FT, ST>(Pair<FT, ST> p, Pair<FT, ST> q) where FT : IComparable<FT> where ST : IComparable<ST>
{
return (p.CompareTo(q) >= 0) ? p : q;
}
}
public struct Pair<FT, ST>: IComparable<Pair<FT, ST>> where FT : IComparable<FT> where ST : IComparable<ST>
{
public FT x;
public ST y;
public Pair(FT f, ST s) : this() { x = f; y = s; }
public int CompareTo(Pair<FT, ST> other)
{
var cmp = x.CompareTo(other.x);
return cmp != 0 ? cmp : y.CompareTo(other.y);
}
public override string ToString() { return string.Format("{0} {1}", x, y); }
}
#endregion
#region Set
public class Set<T>: ICollection<T>
{
public Set() { cmp = Comparer<T>.Default; }
public Set(IComparer<T> comparer) { cmp = comparer; }
public Set(Comparison<T> compare) { cmp = Comparer<T>.Create(compare); }
AVLTree<Node> tree = new AVLTree<Node>();
IComparer<T> cmp;
/// <summary>
/// truefalse
/// </summary>
public bool IsMultiSet { get; set; }
/// <summary>
/// O(1)
/// </summary>
public int Count { get { return tree.Count; } }
/// <summary>
/// truefalseO(logN)
/// </summary>
public bool Add(T item)
{
var v = new Node() { Key = item };
var lb = LowerBound(item);
if (!IsMultiSet && UpperBound(item) != lb) return false;
tree.Insert(v, lb);
return true;
}
/// <summary>
/// truefalseO(logN)
/// </summary>
public bool Remove(T item)
{
var lb = LowerBound(item);
var ub = UpperBound(item);
if (ub == lb) return false;
tree.RemoveAt(lb);
return true;
}
/// <summary>
/// 0-indexed k truefalseO(logN)
/// </summary>
public bool RemoveAt(int k)
{
if (k < 0 || k >= Count) return false;
tree.RemoveAt(k);
return true;
}
/// <summary>
/// 0-indexed k O(logN)
/// </summary>
public T this[int index]
{
get
{
if (index < 0 || index >= Count) throw new IndexOutOfRangeException();
var t = tree.Find(tree.root, index);
return t.Key;
}
}
/// <summary>
/// truefalse
/// </summary>
public bool Contains(T item) { return UpperBound(item) != LowerBound(item); }
/// <summary>
/// itemO(logN)
/// </summary>
public int LowerBound(T item) { return tree.root.LowerBound(item, cmp); }
/// <summary>
/// itemO(logN)
/// </summary>
public int UpperBound(T item) { return tree.root.UpperBound(item, cmp); }
/// <summary>
/// O(N)
/// </summary>
public T[] Items
{
get
{
var ret = new T[Count];
int ptr = 0;
walk(tree.root, ret, ref ptr);
return ret;
}
}
public bool IsReadOnly { get { return false; } }
void walk(Node root, T[] a, ref int ptr)
{
if (root.cnt == 0) return;
walk(root.lst, a, ref ptr);
a[ptr++] = root.Key;
walk(root.rst, a, ref ptr);
}
void ICollection<T>.Add(T item) { Add(item); }
public void Clear() { tree.root = tree.NIL; }
public void CopyTo(T[] array, int arrayIndex) { ((ICollection<T>)Items).CopyTo(array, arrayIndex); }
public IEnumerator<T> GetEnumerator() { return ((ICollection<T>)Items).GetEnumerator(); }
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return ((ICollection<T>)Items).GetEnumerator(); }
class Node: AVLTreeNode<Node>, IKey<T>
{
public T Key { get; set; }
public override Node Push()
{
return this;
}
}
}
#endregion
#region AVLTree
public abstract class AVLTreeNode<T>: BinaryTreeNode<T>
where T : AVLTreeNode<T>
{
public int rank;
public override void Update()
{
cnt = 1 + lst.cnt + rst.cnt;
rank = 1 + Math.Max(lst.rank, rst.rank);
}
}
public class AVLTree<T>: Tree<T>
where T : AVLTreeNode<T>, new()
{
public override void Insert(T v, int k) { root = insert(root, v, k); NIL.cnt = 0; }
public override void RemoveAt(int k) { root = removeat(root, k); NIL.cnt = 0; }
T insert(T t, T v, int k)
{
t = t.Push();
if (t.cnt == 0)
{
v.lst = v.rst = NIL;
v.Update();
return v;
}
if (t.lst.cnt >= k)
t.lst = insert(t.lst, v, k);
else
t.rst = insert(t.rst, v, k - t.lst.cnt - 1);
if (t.lst.rank - t.rst.rank == -2)
{
if (t.rst.lst.rank > t.rst.rst.rank) t.rst = rotR(t.rst);
t = rotL(t);
}
else if (t.lst.rank - t.rst.rank == 2)
{
if (t.lst.lst.rank < t.lst.rst.rank) t.lst = rotL(t.lst);
t = rotR(t);
}
else t.Update();
return t;
}
T removeat(T t, int k)
{
t = t.Push();
var cnt = t.lst.cnt;
if (cnt < k) t.rst = removeat(t.rst, k - cnt - 1);
else if (cnt > k) t.lst = removeat(t.lst, k);
else
{
if (cnt == 0) return t.rst;
if (t.rst.cnt == 0) return t.lst;
var next = Find(t.lst, k - 1);
next.lst = removeat(t.lst, k - 1);
next.rst = t.rst;
t = next;
}
if (t.lst.rank - t.rst.rank == -2)
{
if (t.rst.lst.rank > t.rst.rst.rank) t.rst = rotR(t.rst);
t = rotL(t);
}
else if (t.lst.rank - t.rst.rank == 2)
{
if (t.lst.lst.rank < t.lst.rst.rank) t.lst = rotL(t.lst);
t = rotR(t);
}
else t.Update();
return t;
}
}
#endregion
#region BinaryTree
public interface IKey<K> { K Key { get; set; } }
public abstract class BinaryTreeNode<T>
where T : BinaryTreeNode<T>
{
public int cnt;
public T lst, rst;
public abstract T Push();
/// <summary>
/// Update 使
/// </summary>
public abstract void Update();
}
public abstract class Tree<TNode>
where TNode : BinaryTreeNode<TNode>, new()
{
public Tree() { NIL = new TNode(); NIL.lst = NIL; NIL.rst = NIL; root = NIL; }
public readonly TNode NIL;
public TNode root;
public int Count { get { return root.cnt; } }
protected TNode rotR(TNode t)
{
t = t.Push();
var l = t.lst.Push();
t.lst = l.rst;
l.rst = t;
t.Update();
l.Update();
return l;
}
protected TNode rotL(TNode t)
{
t = t.Push();
var r = t.rst.Push();
t.rst = r.lst;
r.lst = t;
r.lst = t;
t.Update();
r.Update();
return r;
}
public TNode Find(TNode t, int k)
{
t = t.Push();
if (k < t.lst.cnt) return Find(t.lst, k);
else if (k > t.lst.cnt) return Find(t.rst, k - t.lst.cnt - 1);
else return t;
}
public abstract void Insert(TNode v, int k);
public abstract void RemoveAt(int k);
}
public static class TreeOperation
{
static public int LowerBound<T, K>
(this T t, K k, IComparer<K> cmp)
where T : BinaryTreeNode<T>, IKey<K>
{
if (t.cnt == 0) return 0;
if (cmp.Compare(k, t.Key) <= 0) return LowerBound(t.lst, k, cmp);
else return 1 + t.lst.cnt + LowerBound(t.rst, k, cmp);
}
static public int UpperBound<T, K>
(this T t, K k, IComparer<K> cmp)
where T : BinaryTreeNode<T>, IKey<K>
{
if (t.cnt == 0) return 0;
if (cmp.Compare(t.Key, k) <= 0) return 1 + t.lst.cnt + UpperBound(t.rst, k, cmp);
else return UpperBound(t.lst, k, cmp);
}
}
#endregion
#region Set<T>
public class aSet<T>
where T : IComparable<T>
{
Node root = Node.NIL;
public int Count { get { return root.cnt; } }
public void Add(T v) { Insert(v, LowerBound(v)); }
public bool Remove(T v)
{
if (EqualRange(v) == 0) return false;
RemoveAt(LowerBound(v));
return true;
}
#region Impl
public void Insert(T v, int k)
{
root = insert(root, v, k);
}
public void RemoveAt(int k)
{
root = removeat(root, k);
}
public int EqualRange(T v) { return UpperBound(v) - LowerBound(v); }
public int LowerBound(T v) { return lowerBound(root, v); }
public int UpperBound(T v) { return upperBound(root, v); }
public T this[int k] { get { return find(root, k); } }
Node insert(Node t, T v, int k)
{
Debug.Assert(t.cnt >= k);
if (t == Node.NIL) return new Node(v);
if (t.lst.cnt >= k)
t.lst = insert(t.lst, v, k);
else
t.rst = insert(t.rst, v, k - t.lst.cnt - 1);
t.Update();
if (t.lst.h - t.rst.h == -2)
{
if (t.rst.lst.h - t.rst.rst.h > 0) t.rst = rotR(t.rst);
t = rotL(t);
}
else if (t.lst.h - t.rst.h == 2)
{
if (t.lst.lst.h - t.lst.rst.h < 0) t.lst = rotL(t.lst);
t = rotR(t);
}
t.Update();
return t;
}
Node removeat(Node t, int k)
{
Debug.Assert(t.cnt > k);
var cnt = t.lst.cnt;
if (cnt < k) t.rst = removeat(t.rst, k - cnt - 1);
else if (cnt > k) t.lst = removeat(t.lst, k);
else
{
if (cnt == 0) return t.rst;
if (t.rst.cnt == 0) return t.lst;
t.val = find(t, k - 1);
t.lst = removeat(t.lst, k - 1);
}
t.Update();
if (t.lst.h - t.rst.h == -2)
{
if (t.rst.lst.h - t.rst.rst.h > 0) t.rst = rotR(t.rst);
t = rotL(t);
}
else if (t.lst.h - t.rst.h == 2)
{
if (t.lst.lst.h - t.lst.rst.h < 0) t.lst = rotL(t.lst);
t = rotR(t);
}
else t.Update();
return t;
}
int lowerBound(Node t, T v)
{
if (t.cnt == 0) return 0;
if (v.CompareTo(t.val) <= 0) return lowerBound(t.lst, v);
else return t.lst.cnt + 1 + lowerBound(t.rst, v);
}
int upperBound(Node t, T v)
{
if (t.cnt == 0) return 0;
if (t.val.CompareTo(v) <= 0) return t.lst.cnt + 1 + upperBound(t.rst, v);
else return upperBound(t.lst, v);
}
T find(Node t, int k)
{
Debug.Assert(k < t.cnt);
if (k == t.lst.cnt) return t.val;
else if (k < t.lst.cnt) return find(t.lst, k);
else return find(t.rst, k - (t.lst.cnt + 1));
}
Node rotR(Node t)
{
var l = t.lst;
var lr = l.rst;
l.rst = t;
t.lst = lr;
t.Update();
l.Update();
return l;
}
Node rotL(Node t)
{
var r = t.rst;
var rl = r.lst;
t.rst = rl;
r.lst = t;
t.Update();
r.Update();
return r;
}
#endregion
class Node
{
static public readonly Node NIL = new Node();
public int h;
public int cnt;
internal T val;
internal Node lst, rst;
private Node() { }
internal Node(T v) { h = 1; cnt = 1; val = v; lst = NIL; rst = NIL; }
public void Update()
{
if (cnt == 0) return;
h = 1 + Math.Max(lst.h, rst.h);
cnt = 1 + lst.cnt + rst.cnt;
}
public override string ToString()
{
return string.Format("count:{0}, value:{1}", cnt, val);
}
public T[] Items { get { return items(this); } }
static public T[] items(Node t)
{
var ret = new T[t.cnt];
var ptr = 0;
dfs(t, ref ptr, ret);
return ret;
}
static void dfs(Node t, ref int ptr, T[] ret)
{
if (t == Node.NIL) return;
dfs(t.lst, ref ptr, ret);
ret[ptr++] = t.val;
dfs(t.rst, ref ptr, ret);
}
}
public T[] Items { get { return root.Items; } }
public override string ToString() { return string.Format("Count = {0}", Count); }
}
#endregion
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