結果

問題 No.2262 Fractions
ユーザー KumaTachiRenKumaTachiRen
提出日時 2023-04-07 22:00:57
言語 C#
(.NET 8.0.404)
結果
WA  
実行時間 -
コード長 10,029 bytes
コンパイル時間 15,490 ms
コンパイル使用メモリ 166,832 KB
実行使用メモリ 58,496 KB
最終ジャッジ日時 2024-10-02 19:31:26
合計ジャッジ時間 23,932 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
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 * 1
other AC * 10 WA * 5 TLE * 1 -- * 29
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 (92 ms)。
MSBuild のバージョン 17.9.6+a4ecab324 (.NET)
  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 #
プレゼンテーションモードにする

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using static Functions;
static class Program
{
static public void Main(string[] args)
{
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });
new Solver();
Console.Out.Flush();
}
}
public class Solver
{
public Solver()
{
Solve();
}
void Solve()
{
int t = ri;
while (t-- > 0)
{
int n = ri;
long k = rl;
{
var dp = new long[n + 1];
for (int i = 1; i <= n; i++) dp[i] = Floor(n, i) * Floor(n, i);
for (int i = n; i >= 1; i--)
for (int j = i * 2; j <= n; j += i)
dp[i] -= dp[j];
if (dp[1] < k)
{
Write(-1);
continue;
}
}
const double eps = 0.000000001;
{
double l = 0, r = n + 1;
while ((r - l) * 1000 > eps)
{
double x = (l + r) / 2;
var dp = new long[n + 1];
for (int i = 1; i <= n; i++)
for (int a = 1; a <= n / i; a++)
dp[i] += Math.Min(n / i, (long)(a * x));
for (int i = n; i >= 1; i--)
for (int j = i * 2; j <= n; j += i)
dp[i] -= dp[j];
if (dp[1] < k) l = x;
else r = x;
}
for (int a = 1; a <= n; a++)
{
int b = (int)(l * a + eps);
if (Math.Abs(l * a - b) < eps)
{
Write($"{b}/{a}");
break;
}
}
}
}
}
const long INF = 1L << 60;
int ri { get { return (int)sc.Integer(); } }
long rl { get { return sc.Integer(); } }
ulong rul { get { return sc.UInteger(); } }
double rd { get { return sc.Double(); } }
string rs { get { return sc.Scan(); } }
string rline { get { return sc.Line(); } }
public StreamScanner sc = new StreamScanner(Console.OpenStandardInput());
[MethodImpl(MethodImplOptions.AggressiveInlining)]
T[] RepArray<T>(T t, int count) => Enumerable.Repeat(t, count).ToArray();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void WriteJoin<T>(string s, IEnumerable<T> t) => Console.WriteLine(string.Join(s, t));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void WriteMat<T>(T[,] a)
{
int sz1 = a.GetLength(0);
int sz2 = a.GetLength(1);
for (int i = 0; i < sz1; i++)
{
var s = new List<string>();
for (int j = 0; j < sz2; j++) s.Add(a[i, j].ToString());
WriteJoin(" ", s);
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Write(object t) => Console.WriteLine(t.ToString());
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Write(string str) => Console.WriteLine(str);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Write(string str, object arg1) => Console.WriteLine(str, arg1);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Write(string str, object arg1, object arg2) => Console.WriteLine(str, arg1, arg2);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Write(string str, object arg1, object arg2, object arg3) => Console.WriteLine(str, arg1, arg2, arg3);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Write(string str, params object[] arg) => Console.WriteLine(str, arg);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void WriteFlush(object t)
{ Console.WriteLine(t.ToString()); Console.Out.Flush(); }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void WriteError(object t) => Console.Error.WriteLine(t.ToString());
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void YN(bool t) => Console.WriteLine(t ? "YES" : "NO");
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void Yn(bool t) => Console.WriteLine(t ? "Yes" : "No");
[MethodImpl(MethodImplOptions.AggressiveInlining)]
void yn(bool t) => Console.WriteLine(t ? "yes" : "no");
}
public static class Functions
{
public static int Popcount(ulong x)
{
x = (x & 0x5555555555555555UL) + ((x >> 1) & 0x5555555555555555UL);
x = (x & 0x3333333333333333UL) + ((x >> 2) & 0x3333333333333333UL);
x = (x & 0x0f0f0f0f0f0f0f0fUL) + ((x >> 4) & 0x0f0f0f0f0f0f0f0fUL);
x = (x & 0x00ff00ff00ff00ffUL) + ((x >> 8) & 0x00ff00ff00ff00ffUL);
x = (x & 0x0000ffff0000ffffUL) + ((x >> 16) & 0x0000ffff0000ffffUL);
x = (x & 0x00000000ffffffffUL) + ((x >> 32) & 0x00000000ffffffffUL);
return (int)x;
}
public static int Popcount(int x)
{
x = (x & 0x55555555) + ((x >> 1) & 0x55555555);
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
x = (x & 0x0f0f0f0f) + ((x >> 4) & 0x0f0f0f0f);
x = (x & 0x00ff00ff) + ((x >> 8) & 0x00ff00ff);
x = (x & 0x0000ffff) + ((x >> 16) & 0x0000ffff);
return x;
}
public static int Ctz(long x)
{
if (x == 0) return -1;
return Popcount((ulong)((x & -x) - 1));
}
public static int SafeMod(int x, int m)
{
int r = x % m;
return r < 0 ? r + m : r;
}
public static long SafeMod(long x, long m)
{
long r = x % m;
return r < 0 ? r + m : r;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static int Sign(long x) => x == 0 ? 0 : (x < 0 ? -1 : 1);
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static int DigitSum(long n, int d = 10) { long s = 0; while (n > 0) { s += n % d; n /=
        d; } return (int)s; }
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static long Floor(long a, long b) => a >= 0 ? a / b : (a + 1) / b - 1;
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static long Ceil(long a, long b) => a > 0 ? (a - 1) / b + 1 : a / b;
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static int Gcd(int a, int b) => b == 0 ? a : Gcd(b, a % b);
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static long Gcd(long a, long b) => b == 0 ? a : Gcd(b, a % b);
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static void Swap(ref int x, ref int y) { x ^= y; y ^= x; x ^= y; }
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static void Swap(ref long x, ref long y) { x ^= y; y ^= x; x ^= y; }
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static void Swap<T>(ref T x, ref T y) { T t = y; y = x; x = t; }
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static T Clamp<T>(T x, T l, T r) where T : IComparable<T> => x.CompareTo(l) <= 0 ? l :
        (x.CompareTo(r) <= 0 ? x : r);
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static T Clamp<T>(ref T x, T l, T r) where T : IComparable<T> => x = x.CompareTo(l) <=
        0 ? l : (x.CompareTo(r) <= 0 ? x : r);
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static void Chmin<T>(ref T x, T y) where T : IComparable<T> { if (x.CompareTo(y) > 0) x
        = y; }
[MethodImpl(MethodImplOptions.AggressiveInlining)] public static void Chmax<T>(ref T x, T y) where T : IComparable<T> { if (x.CompareTo(y) < 0) x
        = y; }
public static int LowerBound<T>(T[] arr, Func<T, int> comp, int l = -1, int r = -1) => LowerBound<T>(arr.AsSpan<T>(), comp, l, r);
public static int LowerBound<T>(Span<T> data, Func<T, int> comp, int l = -1, int r = -1)
{
if (data.Length == 0) return -1;
if (l == -1) l = 0;
if (r == -1) r = data.Length;
while (l < r)
{
int x = (l + r) / 2;
if (comp(data[x]) < 0) l = x + 1;
else r = x;
}
return l;
}
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
private readonly Stream str;
private readonly byte[] buf = new byte[1024];
private int len, ptr;
public bool isEof = false;
public bool IsEndOfStream { get { return isEof; } }
private byte read()
{
if (isEof) throw new EndOfStreamException();
if (ptr >= len)
{
ptr = 0;
if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; }
}
return buf[ptr++];
}
public char Char()
{
byte b = 0;
do b = read();
while (b < 33 || 126 < b);
return (char)b;
}
public string Line()
{
var sb = new StringBuilder();
for (var b = Char(); b != 10 && !isEof; b = (char)read()) sb.Append(b);
return sb.ToString();
}
public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read()) sb.Append(b);
return sb.ToString();
}
public long Integer()
{
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 * 10 + b - '0';
}
}
public ulong UInteger()
{
ulong ret = 0; byte b = 0;
do b = read();
while (b < '0' || '9' < b);
for (; true; b = read())
{
if (b < '0' || '9' < b) return ret;
else ret = ret * 10 + b - '0';
}
}
public double Double() { return double.Parse(Scan()); }
}
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