結果

問題 No.864 四方演算
ユーザー Lily89164763
提出日時 2020-07-13 18:53:14
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 37 ms / 1,000 ms
コード長 2,349 bytes
コンパイル時間 4,001 ms
コンパイル使用メモリ 109,316 KB
実行使用メモリ 17,792 KB
最終ジャッジ日時 2024-11-07 23:04:00
合計ジャッジ時間 4,915 ms
ジャッジサーバーID
(参考情報)
judge2 / judge1
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 * 3
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 CompLib.Util;
public class Program
{
public void Solve()
{
var sc = new Scanner();
long n = sc.NextLong();
long k = sc.NextLong();
long ans = 0;
for (long ac = 1; ac * ac <= k; ac++)
{
if (k % ac != 0) continue;
long bd = k / ac;
// ac,bd[1,N]2
// Console.WriteLine($"{ac} {C(ac, n)} {bd} {C(bd, n)}");
ans += C(ac, n) * C(bd, n) * (ac == bd ? 1 : 2);
}
Console.WriteLine(ans);
}
long C(long sum, long n)
{
if (sum > 2 * n) return 0;
if (sum <= n + 1) return sum - 1;
return 2 * n - sum + 1;
}
public static void Main(string[] args) => new Program().Solve();
}
namespace CompLib.Util
{
using System;
using System.Linq;
class Scanner
{
private string[] _line;
private int _index;
private const char Separator = ' ';
public Scanner()
{
_line = new string[0];
_index = 0;
}
public string Next()
{
if (_index >= _line.Length)
{
string s;
do
{
s = Console.ReadLine();
} while (s.Length == 0);
_line = s.Split(Separator);
_index = 0;
}
return _line[_index++];
}
public int NextInt() => int.Parse(Next());
public long NextLong() => long.Parse(Next());
public double NextDouble() => double.Parse(Next());
public decimal NextDecimal() => decimal.Parse(Next());
public char NextChar() => Next()[0];
public char[] NextCharArray() => Next().ToCharArray();
public string[] Array()
{
string s = Console.ReadLine();
_line = s.Length == 0 ? new string[0] : s.Split(Separator);
_index = _line.Length;
return _line;
}
public int[] IntArray() => Array().Select(int.Parse).ToArray();
public long[] LongArray() => Array().Select(long.Parse).ToArray();
public double[] DoubleArray() => Array().Select(double.Parse).ToArray();
public decimal[] DecimalArray() => Array().Select(decimal.Parse).ToArray();
}
}
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