結果

問題 No.1238 選抜クラス
ユーザー keymoonkeymoon
提出日時 2020-09-25 21:43:55
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 226 ms / 2,000 ms
コード長 3,247 bytes
コンパイル時間 2,632 ms
コンパイル使用メモリ 107,412 KB
実行使用メモリ 25,068 KB
最終ジャッジ日時 2023-09-10 15:07:24
合計ジャッジ時間 9,390 ms
ジャッジサーバーID
(参考情報)
judge11 / judge12
このコードへのチャレンジ(β)

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 66 ms
22,832 KB
testcase_01 AC 69 ms
24,876 KB
testcase_02 AC 76 ms
23,016 KB
testcase_03 AC 65 ms
22,828 KB
testcase_04 AC 65 ms
23,004 KB
testcase_05 AC 64 ms
22,820 KB
testcase_06 AC 64 ms
24,776 KB
testcase_07 AC 72 ms
24,920 KB
testcase_08 AC 76 ms
24,844 KB
testcase_09 AC 83 ms
24,808 KB
testcase_10 AC 73 ms
24,844 KB
testcase_11 AC 81 ms
22,908 KB
testcase_12 AC 77 ms
22,788 KB
testcase_13 AC 77 ms
22,880 KB
testcase_14 AC 75 ms
22,808 KB
testcase_15 AC 82 ms
22,824 KB
testcase_16 AC 81 ms
22,792 KB
testcase_17 AC 206 ms
25,068 KB
testcase_18 AC 208 ms
24,888 KB
testcase_19 AC 219 ms
22,864 KB
testcase_20 AC 197 ms
24,916 KB
testcase_21 AC 209 ms
22,872 KB
testcase_22 AC 204 ms
22,788 KB
testcase_23 AC 226 ms
20,780 KB
testcase_24 AC 203 ms
24,836 KB
testcase_25 AC 202 ms
20,732 KB
testcase_26 AC 204 ms
23,036 KB
testcase_27 AC 222 ms
22,772 KB
testcase_28 AC 217 ms
22,728 KB
testcase_29 AC 213 ms
23,016 KB
testcase_30 AC 108 ms
24,824 KB
testcase_31 AC 143 ms
24,848 KB
testcase_32 AC 185 ms
22,864 KB
testcase_33 AC 73 ms
22,812 KB
testcase_34 AC 188 ms
22,900 KB
testcase_35 AC 121 ms
24,880 KB
testcase_36 AC 88 ms
24,888 KB
testcase_37 AC 108 ms
22,832 KB
testcase_38 AC 209 ms
22,832 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 #

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using static System.Math;
public static class P
{
    public static void Main()
    {
        var nk = Console.ReadLine().Split().Select(int.Parse).ToArray();
        var n = nk[0];
        var k = nk[1];
        var a = Console.ReadLine().Split().Select(x => int.Parse(x) - k).ToArray();
        int OFFSET = 100000;
        ModInt[] dp = new ModInt[OFFSET * 2 + 1];
        dp[OFFSET] = 1;
        foreach (var item in a)
        {
            if (item < 0)
            {
                for (int i = -item; i < dp.Length; i++)
                    dp[i + item] += dp[i];
            }
            else
            {
                for (int i = dp.Length - item - 1; 
                    i >= 0; 
                    i--)
                    dp[i + item] += dp[i];
            }
        }
        ModInt res = 0;
        for (int i = OFFSET; i < dp.Length; i++)
            res += dp[i];
        Console.WriteLine(res - 1);
    }
}


struct ModInt
{
    public const int Mod = 1000000007;
    const long POSITIVIZER = ((long)Mod) << 31;
    long Data;
    public ModInt(long data) { if ((Data = data % Mod) < 0) Data += Mod; }
    public static implicit operator long(ModInt modInt) => modInt.Data;
    public static implicit operator ModInt(long val) => new ModInt(val);
    public static ModInt operator +(ModInt a, int b) => new ModInt() { Data = (a.Data + b + POSITIVIZER) % Mod };
    public static ModInt operator +(ModInt a, long b) => new ModInt(a.Data + b);
    public static ModInt operator +(ModInt a, ModInt b) { long res = a.Data + b.Data; return new ModInt() { Data = res >= Mod ? res - Mod : res }; }
    public static ModInt operator -(ModInt a, int b) => new ModInt() { Data = (a.Data - b + POSITIVIZER) % Mod };
    public static ModInt operator -(ModInt a, long b) => new ModInt(a.Data - b);
    public static ModInt operator -(ModInt a, ModInt b) { long res = a.Data - b.Data; return new ModInt() { Data = res < 0 ? res + Mod : res }; }
    public static ModInt operator *(ModInt a, int b) => new ModInt(a.Data * b);
    public static ModInt operator *(ModInt a, long b) => a * new ModInt(b);
    public static ModInt operator *(ModInt a, ModInt b) => new ModInt() { Data = a.Data * b.Data % Mod };
    public static ModInt operator /(ModInt a, ModInt b) => new ModInt() { Data = a.Data * GetInverse(b) % Mod };
    public static bool operator ==(ModInt a, ModInt b) => a.Data == b.Data;
    public static bool operator !=(ModInt a, ModInt b) => a.Data != b.Data;
    public override string ToString() => Data.ToString();
    public override bool Equals(object obj) => (ModInt)obj == this;
    public override int GetHashCode() => (int)Data;
    static long GetInverse(long a)
    {
        long div, p = Mod, x1 = 1, y1 = 0, x2 = 0, y2 = 1;
        while (true)
        {
            if (p == 1) return x2 + Mod; div = a / p; x1 -= x2 * div; y1 -= y2 * div; a %= p;
            if (a == 1) return x1 + Mod; div = p / a; x2 -= x1 * div; y2 -= y1 * div; p %= a;
        }
    }
}
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