結果
問題 | No.1072 A Nice XOR Pair |
ユーザー | EmKjp |
提出日時 | 2020-06-05 21:41:30 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 160 ms / 2,000 ms |
コード長 | 5,939 bytes |
コンパイル時間 | 1,059 ms |
コンパイル使用メモリ | 117,132 KB |
実行使用メモリ | 51,360 KB |
最終ジャッジ日時 | 2024-12-17 13:54:53 |
合計ジャッジ時間 | 2,820 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 | 28 ms
23,912 KB |
testcase_01 | AC | 28 ms
23,784 KB |
testcase_02 | AC | 27 ms
24,024 KB |
testcase_03 | AC | 27 ms
24,040 KB |
testcase_04 | AC | 28 ms
24,112 KB |
testcase_05 | AC | 28 ms
25,960 KB |
testcase_06 | AC | 29 ms
25,964 KB |
testcase_07 | AC | 159 ms
43,912 KB |
testcase_08 | AC | 131 ms
32,044 KB |
testcase_09 | AC | 125 ms
27,952 KB |
testcase_10 | AC | 129 ms
29,956 KB |
testcase_11 | AC | 122 ms
34,012 KB |
testcase_12 | AC | 160 ms
51,360 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;using System.Collections.Generic;using System.Diagnostics;using System.Globalization;using System.IO;using System.Text;using System.Linq;using E = System.Linq.Enumerable;internal partial class Solver {public void Run() {var n = ni();var x = ni();var a = ni(n);var h = new HashMap<int, int>();foreach (var p in a) {h[p]++;}long ans = 0;foreach (var p in a) {var count = h[p ^ x];if (p == (p ^ x)) {count--;}ans += count;}cout.WriteLine(ans / 2);}}public class HashMap<TKey, TValue> : Dictionary<TKey, TValue> {public new TValue this[TKey index] {get {TValue value;if (TryGetValue(index, out value)) {return value;} else {return base[index] = default(TValue);}}set {base[index] = value;}}}// PREWRITEN CODE BEGINS FROM HEREstatic public class StringExtensions {static public string JoinToString<T>(this IEnumerable<T> source, string separator = " ") {return string.Join(separator, source);}}internal partial class Solver : Scanner {public static void Main() {#if LOCALbyte[] inputBuffer = new byte[1000000];var inputStream = Console.OpenStandardInput(inputBuffer.Length);using (var reader = new StreamReader(inputStream, Console.InputEncoding, false, inputBuffer.Length)) {Console.SetIn(reader);new Solver(Console.In, Console.Out).Run();}#elseConsole.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });new Solver(Console.In, Console.Out).Run();Console.Out.Flush();#endif}#pragma warning disable IDE0052private readonly TextReader cin;private readonly TextWriter cout;private readonly TextWriter cerr;#pragma warning restore IDE0052public Solver(TextReader reader, TextWriter writer): base(reader) {cin = reader;cout = writer;cerr = Console.Error;}public Solver(string input, TextWriter writer): this(new StringReader(input), writer) {}#pragma warning disable IDE1006#pragma warning disable IDE0051private int ni() { return NextInt(); }private int[] ni(int n) { return NextIntArray(n); }private long nl() { return NextLong(); }private long[] nl(int n) { return NextLongArray(n); }private double nd() { return NextDouble(); }private double[] nd(int n) { return NextDoubleArray(n); }private string ns() { return Next(); }private string[] ns(int n) { return NextArray(n); }#pragma warning restore IDE1006#pragma warning restore IDE0051}internal static class LinqPadExtension {[Conditional("DEBUG")]public static void Dump<T>(this T obj) {#if DEBUGLINQPad.Extensions.Dump(obj);#endif}}public class Scanner {private readonly TextReader Reader;private readonly CultureInfo ci = CultureInfo.InvariantCulture;private readonly char[] buffer = new char[2 * 1024];private int cursor = 0, length = 0;private string Token;private readonly StringBuilder sb = new StringBuilder(1024);public Scanner(): this(Console.In) {}public Scanner(TextReader reader) {Reader = reader;}public int NextInt() { return checked((int)NextLong()); }public long NextLong() {var s = Next();long r = 0;int i = 0;bool negative = false;if (s[i] == '-') {negative = true;i++;}for (; i < s.Length; i++) {r = r * 10 + (s[i] - '0');#if DEBUGif (!char.IsDigit(s[i])) throw new FormatException();#endif}return negative ? -r : r;}public double NextDouble() { return double.Parse(Next(), ci); }public string[] NextArray(int size) {string[] array = new string[size];for (int i = 0; i < size; i++) {array[i] = Next();}return array;}public int[] NextIntArray(int size) {int[] array = new int[size];for (int i = 0; i < size; i++) {array[i] = NextInt();}return array;}public long[] NextLongArray(int size) {long[] array = new long[size];for (int i = 0; i < size; i++) {array[i] = NextLong();}return array;}public double[] NextDoubleArray(int size) {double[] array = new double[size];for (int i = 0; i < size; i++) {array[i] = NextDouble();}return array;}public string Next() {if (Token == null) {if (!StockToken()) {throw new Exception();}}var token = Token;Token = null;return token;}public bool HasNext() {if (Token != null) {return true;}return StockToken();}private bool StockToken() {while (true) {sb.Clear();while (true) {if (cursor >= length) {cursor = 0;if ((length = Reader.Read(buffer, 0, buffer.Length)) <= 0) {break;}}var c = buffer[cursor++];if (33 <= c && c <= 126) {sb.Append(c);} else {if (sb.Length > 0) break;}}if (sb.Length > 0) {Token = sb.ToString();return true;}return false;}}}