結果

問題 No.3262 水色コーダーさん、その問題d問題ですよ?(1<=d<=N)
ユーザー yupiteru_kun
提出日時 2025-09-06 13:10:19
言語 C#
(.NET 8.0.404)
結果
AC  
実行時間 59 ms / 2,000 ms
コード長 23,733 bytes
コンパイル時間 9,343 ms
コンパイル使用メモリ 170,092 KB
実行使用メモリ 192,340 KB
最終ジャッジ日時 2025-09-06 13:12:21
合計ジャッジ時間 11,898 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
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 * 2
other AC * 24
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
  復元対象のプロジェクトを決定しています...
  /home/judge/data/code/main.csproj を復元しました (155 ミリ秒)。
  main -> /home/judge/data/code/bin/Release/net8.0/main.dll
  main -> /home/judge/data/code/bin/Release/net8.0/publish/

ソースコード

diff #

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using static System.Math;
using System.Text;
using System.Threading;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Library;

namespace Program
{
    using static Library.LIB_Static;
    public static class ProblemD
    {
        static bool SAIKI = false;
        static public int numberOfRandomCases = 0;
        static public void MakeTestCase(List<string> _input, List<string> _output, ref Func<string[], bool> _outputChecker)
        {
        }
        static public void Solve()
        {
            var N = NN;
            var LR = Range(0, N).Select(_ => new { idx = _, L = NN, R = NN }).ToArray();
            var ary = Range(0, N).ToArray();
            var ans = 0L;
            while (true)
            {
                LIB_Math.NextPermutation(ary);

                var minX = -1L;
                var ok = true;
                foreach (var idx in ary)
                {
                    var l = LR[idx].L;
                    var r = LR[idx].R;
                    minX = Max(minX, l);
                    if (minX > r) ok = false;
                }
                if (ok) ++ans;

                var exit = true;
                for (var i = 0; i < N; ++i)
                {
                    if (i != ary[i]) exit = false;
                }
                if (exit) break;
            }
            Console.WriteLine(ans);
        }
        class Printer : StreamWriter
        {
            public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
            public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { base.AutoFlush = false; }
            public Printer(Stream stream, Encoding encoding) : base(stream, encoding) { base.AutoFlush = false; }
        }
        static LIB_FastIO fastio = new LIB_FastIODebug();
        static string[] args;
        static public void Main(string[] args_t) { args = args_t; if (args_t.Length == 0) { fastio = new LIB_FastIO(); Console.SetOut(new Printer(Console.OpenStandardOutput())); } if (SAIKI) { var t = new Thread(Solve, 134217728); t.Start(); t.Join(); } else Solve(); Console.Out.Flush(); }
        static long NN => fastio.Long();
        static double ND => fastio.Double();
        static string NS => fastio.Scan();
        static long[] NNList(long N) => Repeat(0, N).Select(_ => NN).ToArray();
        static double[] NDList(long N) => Repeat(0, N).Select(_ => ND).ToArray();
        static string[] NSList(long N) => Repeat(0, N).Select(_ => NS).ToArray();
    }
}
namespace Library {
    class LIB_FastIO
    {
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public LIB_FastIO() { str = Console.OpenStandardInput(); }
        readonly Stream str;
        readonly byte[] buf = new byte[2048];
        int len, ptr;
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        byte read()
        {
            if (ptr >= len)
            {
                ptr = 0;
                if ((len = str.Read(buf, 0, 2048)) <= 0)
                {
                    return 0;
                }
            }
            return buf[ptr++];
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        char Char()
        {
            byte b = 0;
            do b = read();
            while (b < 33 || 126 < b);
            return (char)b;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        virtual public string Scan()
        {
            var sb = new StringBuilder();
            for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
                sb.Append(b);
            return sb.ToString();
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        virtual public long Long()
        {
            long ret = 0; byte b = 0; var ng = false;
            do b = read();
            while (b != '-' && (b < '0' || '9' < b));
            if (b == '-') { ng = true; b = read(); }
            for (; true; b = read())
            {
                if (b < '0' || '9' < b)
                    return ng ? -ret : ret;
                else ret = (ret << 3) + (ret << 1) + b - '0';
            }
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        virtual public double Double() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }
    }
    class LIB_FastIODebug : LIB_FastIO
    {
        Queue<string> param = new Queue<string>();
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        string NextString() { if (param.Count == 0) foreach (var item in Console.ReadLine().Split(' ')) param.Enqueue(item); return param.Dequeue(); }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public LIB_FastIODebug() { }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public override string Scan() => NextString();
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public override long Long() => long.Parse(NextString());
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public override double Double() => double.Parse(NextString());
    }
    class LIB_BarrettReduction
    {
        ulong MOD;
        ulong mh;
        ulong ml;
        const ulong ALL1_32 = (ulong)~0U;
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public LIB_BarrettReduction(ulong mod)
        {
            MOD = mod;
            var m = ~0UL / MOD;
            unchecked { if (m * MOD + MOD == 0) ++m; }
            mh = m >> 32;
            ml = m & ALL1_32;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public ulong Reduce(ulong x)
        {
            var z = (x & ALL1_32) * ml;
            z = (x & ALL1_32) * mh + (x >> 32) * ml + (z >> 32);
            z = (x >> 32) * mh + (z >> 32);
            x -= z * MOD;
            return x < MOD ? x : x - MOD;
        }
    }
    class LIB_MillerRabin
    {
        static readonly ulong[] a1 = new ulong[] { 2, 7, 61 };
        static readonly ulong[] a21 = new ulong[] { 2, 325, 9375, 28178, 450775, 9780504 };
        static readonly ulong[] a22 = new ulong[] { 2, 325, 9375, 28178, 450775, 9780504, 1795265022 };
        static readonly byte[] smallPrimes = new byte[] { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251 };
        static public bool IsPrime(ulong N)
        {
            if (N < 66049)
            {
                var n = (int)N;
                if (n < 2) return false;
                if ((n & 1) == 0) return n == 2;
                if (n == 3) return true;
                foreach (int p in smallPrimes)
                {
                    if (p * p > n) break;
                    if (n % p == 0) return false;
                }
                return true;
            }
            if ((N & 1) == 0) return false;
            if (1000000000 < N) return IsPrime64(N);
            var br = new LIB_BarrettReduction(N);
            var d = N - 1;
            var cnt = 0;
            while ((d & 1) == 0)
            {
                d >>= 1;
                ++cnt;
            }
            foreach (var item in a1)
            {
                var x = 1UL;
                var d2 = d;
                var num = item;
                while (d2 > 0)
                {
                    if ((d2 & 1) == 1) x = br.Reduce(x * num);
                    d2 >>= 1;
                    num = br.Reduce(num * num);
                }

                var i = 0;
                for (; i < cnt; ++i)
                {
                    if (x == 1 || x == N - 1) break;
                    x = br.Reduce(x * x);
                }
                if (i > 0 && x != N - 1) return false;
            }
            return true;
        }
        [MethodImpl(MethodImplOptions.AggressiveOptimization)]
        static bool IsPrime64(ulong N)
        {
            unchecked
            {
                var T128 = (ulong)(-(UInt128)N % N);
                var INV_MOD = N;
                INV_MOD *= 2 - N * INV_MOD;
                INV_MOD *= 2 - N * INV_MOD;
                INV_MOD *= 2 - N * INV_MOD;
                INV_MOD *= 2 - N * INV_MOD;
                INV_MOD *= 2 - N * INV_MOD;
                var NEG_INV = ~INV_MOD + 1;

                var t = (UInt128)T128;
                var ONE = (ulong)((t + (UInt128)((ulong)t * NEG_INV) * N) >> 64);
                t = ((UInt128)N - 1) * T128;
                var MINUS_ONE = (ulong)((t + (UInt128)((ulong)t * NEG_INV) * N) >> 64);
                if (ONE >= N) ONE -= N;
                if (MINUS_ONE >= N) MINUS_ONE -= N;

                var d = N - 1;
                var cnt = 0;
                while ((d & 1) == 0)
                {
                    d >>= 1;
                    ++cnt;
                }
                var a2 = N < 1795265022 ? a21 : a22;
                foreach (var item in a2)
                {
                    var x = ONE;
                    var d2 = d;
                    t = (UInt128)item * T128;
                    var num = (ulong)((t + (UInt128)((ulong)t * NEG_INV) * N) >> 64);
                    while (d2 > 0)
                    {
                        if ((d2 & 1) == 1)
                        {
                            t = (UInt128)x * num;
                            x = (ulong)((t + (UInt128)((ulong)t * NEG_INV) * N) >> 64);
                        }
                        d2 >>= 1;
                        t = (UInt128)num * num;
                        num = (ulong)((t + (UInt128)((ulong)t * NEG_INV) * N) >> 64);
                    }

                    var i = 0;
                    var v = x >= N ? x - N : x;
                    for (; i < cnt; ++i)
                    {
                        if (v == ONE || v == MINUS_ONE) break;
                        t = (UInt128)x * x;
                        x = (ulong)((t + (UInt128)((ulong)t * NEG_INV) * N) >> 64);
                        v = x >= N ? x - N : x;
                    }
                    if (i > 0 && v != MINUS_ONE) return false;
                }
                return true;
            }
        }
    }
    class LIB_Math
    {
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public bool IsPrime(long x) => LIB_MillerRabin.IsPrime((ulong)x);
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public IEnumerable<long> Primes(long x)
        {
            if (x < 2) yield break;
            yield return 2;
            var halfx = x / 2;
            var table = new bool[halfx + 1];
            var max = (long)(Math.Sqrt(x) / 2);
            for (long i = 1; i <= max; ++i)
            {
                if (table[i]) continue;
                var add = 2 * i + 1;
                yield return add;
                for (long j = 2 * i * (i + 1); j <= halfx; j += add)
                    table[j] = true;
            }
            for (long i = max + 1; i <= halfx; ++i)
                if (!table[i] && 2 * i + 1 <= x)
                    yield return 2 * i + 1;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public IEnumerable<long> Factors(long x)
        {
            if (x < 2) yield break;
            while (x % 2 == 0)
            {
                x /= 2; yield return 2;
            }
            var max = (long)Math.Sqrt(x);
            for (long i = 3; i <= max; i += 2)
            {
                while (x % i == 0)
                {
                    x /= i; yield return i;
                }
            }
            if (x != 1) yield return x;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public IEnumerable<long> Divisor(long x)
        {
            if (x < 1) yield break;
            var max = (long)Math.Sqrt(x);
            for (long i = 1; i <= max; ++i)
            {
                if (x % i != 0) continue;
                yield return i;
                if (i != x / i) yield return x / i;
            }
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public long GCD(long a, long b)
        {
            while (b > 0)
            {
                var tmp = b;
                b = a % b;
                a = tmp;
            }
            return a;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public long LCM(long a, long b) => a / GCD(a, b) * b;
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public long Pow(long x, long y)
        {
            long a = 1;
            while (y != 0)
            {
                if ((y & 1) == 1) a *= x;
                if (x < long.MaxValue / x) x *= x;
                y >>= 1;
            }
            return a;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public decimal Sqrt(decimal x)
        {
            decimal prev, cur = (decimal)Math.Sqrt((double)x);
            do
            {
                prev = cur;
                if (prev == 0) return 0;
                cur = (prev + x / prev) / 2;
            } while (cur != prev);
            return cur;
        }
        static List<long> _fact = new List<long>() { 1 };
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static void Build(long n)
        {
            if (n >= _fact.Count)
                for (int i = _fact.Count; i <= n; ++i) _fact.Add(_fact[i - 1] * i);
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public long Comb(long n, long k)
        {
            Build(n);
            if (n == 0 && k == 0) return 1;
            if (n < k || n < 0) return 0;
            return _fact[(int)n] / _fact[(int)(n - k)] / _fact[(int)k];
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public long Perm(long n, long k)
        {
            Build(n);
            if (n == 0 && k == 0) return 1;
            if (n < k || n < 0) return 0;
            return _fact[(int)n] / _fact[(int)(n - k)];
        }
        static public void PrevPermutation<T>(T[] ary) where T : IComparable<T>
        {
            var n = ary.Length;
            var i = n - 1;
            while (i - 1 >= 0 && ary[i - 1].CompareTo(ary[i]) <= 0) --i;
            if (i > 0)
            {
                var j = i;
                while (j + 1 < n && ary[i - 1].CompareTo(ary[j + 1]) > 0) ++j;
                var tmp = ary[i - 1]; ary[i - 1] = ary[j]; ary[j] = tmp;
            }
            var s = i;
            var t = n - 1;
            while (t - s > 0)
            {
                var tmp = ary[t]; ary[t] = ary[s]; ary[s] = tmp;
                ++s; --t;
            }
        }
        static public void NextPermutation<T>(T[] ary) where T : IComparable<T>
        {
            var n = ary.Length;
            var i = n - 1;
            while (i - 1 >= 0 && ary[i - 1].CompareTo(ary[i]) >= 0) --i;
            if (i > 0)
            {
                var j = i;
                while (j + 1 < n && ary[i - 1].CompareTo(ary[j + 1]) < 0) ++j;
                var tmp = ary[i - 1]; ary[i - 1] = ary[j]; ary[j] = tmp;
            }
            var s = i;
            var t = n - 1;
            while (t - s > 0)
            {
                var tmp = ary[t]; ary[t] = ary[s]; ary[s] = tmp;
                ++s; --t;
            }
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public (long, long) InvGCD(long a, long b)
        {
            a = (a + b) % b;
            if (a == 0) return (b, 0);
            var s = b;
            var t = a;
            var m0 = 0L;
            var m1 = 1L;
            while (t > 0)
            {
                var u = s / t; s -= t * u; m0 -= m1 * u;
                var tmp = s; s = t; t = tmp;
                tmp = m0; m0 = m1; m1 = tmp;
            }
            if (m0 < 0) m0 += b / s;
            return (s, m0);
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public (long, long) CRT(long[] r, long[] m)
        {
            var r0 = 0L;
            var m0 = 1L;
            for (var i = 0; i < m.Length; i++)
            {
                var m1 = m[i];
                var r1 = (r[i] + m1) % m1;
                if (m0 < m1)
                {
                    r0 ^= r1; r1 ^= r0; r0 ^= r1;
                    m0 ^= m1; m1 ^= m0; m0 ^= m1;
                }
                if (m0 % m1 == 0)
                {
                    if (r0 % m1 != r1) return (0, 0);
                    continue;
                }
                var gim = InvGCD(m0, m1);
                var u1 = m1 / gim.Item1;
                if ((r1 - r0) % gim.Item1 != 0) return (0, 0);
                var x = (r1 - r0) / gim.Item1 % u1 * gim.Item2 % u1;
                r0 += x * m0;
                m0 *= u1;
                if (r0 < 0) r0 += m0;
            }
            return (r0, m0);
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        static public long Phi(long n)
        {
            var ret = n;
            for (var i = 2L; i * i <= n; ++i)
            {
                if (n % i == 0)
                {
                    ret -= ret / i;
                    while (n % i == 0) n /= i;
                }
            }
            if (n > 1) ret -= ret / n;
            return ret;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
        /// <summary>
        /// a*i + b
        /// i=0...n-1
        /// 格子高さm
        /// </summary>
        static public long FloorSum(long n, long m, long a, long b)
        {
            unchecked
            {
                var ans = 0UL;
                var un = (ulong)n;
                var um = (ulong)m;
                var ua = (ulong)a;
                var ub = (ulong)b;
                if (a < 0)
                {
                    var am = a % m;
                    if (am < 0) am += m;
                    var a2 = (ulong)am;
                    ans -= un * (un - 1) / 2 * ((a2 + (ulong)(-a)) / um);
                    ua = a2;
                }
                if (b < 0)
                {
                    var bm = b % m;
                    if (bm < 0) bm += m;
                    var b2 = (ulong)bm;
                    ans -= un * ((b2 + (ulong)(-b)) / um);
                    ub = b2;
                }
                while (true)
                {
                    if (ua >= um)
                    {
                        ans += (un - 1) * un / 2 * (ua / um);
                        ua %= um;
                    }
                    if (ub >= um)
                    {
                        ans += un * (ub / um);
                        ub %= um;
                    }
                    var ymax = ua * un + ub;
                    if (ymax < um) return (long)ans;
                    un = ymax / um;
                    ub = ymax % um;
                    um ^= ua; ua ^= um; um ^= ua;
                }
            }
        }
        static public long BabyStepGiantStep<T>(T init, T target, long step, Func<T, T> babyStep, Func<T, T> giantStep) where T : IEquatable<T>
        {
            // minimal check
            var chk = init;
            for (var i = 0; i < step; ++i)
            {
                if (chk.Equals(target)) return i;
                chk = babyStep(chk);
            }

            var dic = new Dictionary<T, long>();
            chk = target;
            for (var i = 1; i <= step; ++i)
            {
                chk = babyStep(chk);
                dic[chk] = i;
            }
            var now = init;
            var fail = false;
            for (var i = 1; i <= step; ++i)
            {
                var next = giantStep(now);
                if (dic.ContainsKey(next))
                {
                    chk = now;
                    for (var j = 0; j < step; ++j)
                    {
                        if (target.Equals(chk))
                        {
                            return (i - 1) * step + j;
                        }
                        chk = babyStep(chk);
                    }
                    if (fail) return -1;
                    fail = true;
                }
                now = next;
            }
            return -1;
        }
    }
    static partial class LIB_Static
    {
        public static uint xorshift { get { _xsi.MoveNext(); return _xsi.Current; } }
        public static IEnumerator<uint> _xsi = _xsc();
        public static IEnumerator<uint> _xsc() { uint x = 123456789, y = 362436069, z = 521288629, w = 0; while (true) { var t = x ^ (x << 11); x = y; y = z; z = w; w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); yield return w; } }
        public static long Count<T>(this IEnumerable<T> x, Func<T, bool> pred) => Enumerable.Count(x, pred);
        public static IEnumerable<T> Repeat<T>(T v, long n) => Enumerable.Repeat<T>(v, (int)n);
        public static IEnumerable<int> Range(long s, long c) => Enumerable.Range((int)s, (int)c);
        public static IOrderedEnumerable<T> OrderByRand<T>(this IEnumerable<T> x) => Enumerable.OrderBy(x, _ => xorshift);
        public static IOrderedEnumerable<T> OrderBy<T>(this IEnumerable<T> x) => Enumerable.OrderBy(x.OrderByRand(), e => e);
        public static IOrderedEnumerable<T1> OrderBy<T1, T2>(this IEnumerable<T1> x, Func<T1, T2> selector) => Enumerable.OrderBy(x.OrderByRand(), selector);
        public static IOrderedEnumerable<T> OrderByDescending<T>(this IEnumerable<T> x) => Enumerable.OrderByDescending(x.OrderByRand(), e => e);
        public static IOrderedEnumerable<T1> OrderByDescending<T1, T2>(this IEnumerable<T1> x, Func<T1, T2> selector) => Enumerable.OrderByDescending(x.OrderByRand(), selector);
        public static IOrderedEnumerable<string> OrderBy(this IEnumerable<string> x) => x.OrderByRand().OrderBy(e => e, StringComparer.OrdinalIgnoreCase);
        public static IOrderedEnumerable<T> OrderBy<T>(this IEnumerable<T> x, Func<T, string> selector) => x.OrderByRand().OrderBy(selector, StringComparer.OrdinalIgnoreCase);
        public static IOrderedEnumerable<string> OrderByDescending(this IEnumerable<string> x) => x.OrderByRand().OrderByDescending(e => e, StringComparer.OrdinalIgnoreCase);
        public static IOrderedEnumerable<T> OrderByDescending<T>(this IEnumerable<T> x, Func<T, string> selector) => x.OrderByRand().OrderByDescending(selector, StringComparer.OrdinalIgnoreCase);
        public static string Join<T>(this IEnumerable<T> x, string separator = "") => string.Join(separator, x);
        public static bool Chmax<T>(this ref T lhs, T rhs) where T : struct, IComparable<T> { if (lhs.CompareTo(rhs) < 0) { lhs = rhs; return true; } return false; }
        public static bool Chmin<T>(this ref T lhs, T rhs) where T : struct, IComparable<T> { if (lhs.CompareTo(rhs) > 0) { lhs = rhs; return true; } return false; }
        public static void Fill<T>(this T[] array, T value) => array.AsSpan().Fill(value);
        public static void Fill<T>(this T[,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0], array.Length).Fill(value);
        public static void Fill<T>(this T[,,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0, 0], array.Length).Fill(value);
        public static void Fill<T>(this T[,,,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0, 0, 0], array.Length).Fill(value);
    }
}
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