結果
問題 | No.742 にゃんにゃんにゃん 猫の挨拶 |
ユーザー |
|
提出日時 | 2018-10-05 21:40:59 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 54 ms / 2,500 ms |
コード長 | 2,604 bytes |
コンパイル時間 | 1,010 ms |
コンパイル使用メモリ | 113,100 KB |
実行使用メモリ | 31,532 KB |
最終ジャッジ日時 | 2024-10-12 13:55:11 |
合計ジャッジ時間 | 2,254 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge |
(要ログイン)
ファイルパターン | 結果 |
---|---|
other | AC * 16 |
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.Text;//using System.Text.RegularExpressions;//using System.Globalization;//using System.Diagnostics;using static System.Console;//using System.Numerics;//using static System.Math;//using pair = Pair<int, int>;class Program{static void Main(){//SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });new Program().solve();Out.Flush();}Scanner cin = new Scanner();readonly int[] dd = { 0, 1, 0, -1, 0 }; //→↓←↑readonly int mod = 1000000007;void chmax<T>(ref T a, T b) where T : IComparable<T> { a = a.CompareTo(b) < 0 ? b : a; }void chmin<T>(ref T a, T b) where T : IComparable<T> { a = a.CompareTo(b) < 0 ? a : b; }void solve(){int N = cin.nextint;var A = new int[N];for (int i = 0; i < N; i++){int a = cin.nextint - 1;A[i] = a;}WriteLine(merge_count(A));}long merge_count(int[] A){int n = A.Length;if (n <= 1) return 0;long cnt = 0;var B = A.Take(n / 2).ToArray();var C = A.Skip(n / 2).ToArray();cnt += merge_count(B);cnt += merge_count(C);int ai = 0, bi = 0, ci = 0;while (ai < n){if (bi < B.Length && (ci == C.Length || B[bi] <= C[ci])){A[ai++] = B[bi++];}else{cnt += n / 2 - bi;A[ai++] = C[ci++];}}return cnt;}}class Scanner{string[] s; int i;char[] cs = new char[] { ' ' };public Scanner() { s = new string[0]; i = 0; }public string[] scan { get { return ReadLine().Split(); } }public int[] scanint { get { return Array.ConvertAll(scan, int.Parse); } }public long[] scanlong { get { return Array.ConvertAll(scan, long.Parse); } }public double[] scandouble { get { return Array.ConvertAll(scan, double.Parse); } }public string next{get{if (i < s.Length) return s[i++];string st = ReadLine();while (st == "") st = ReadLine();s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);i = 0;return next;}}public int nextint { get { return int.Parse(next); } }public long nextlong { get { return long.Parse(next); } }public double nextdouble { get { return double.Parse(next); } }}