結果
| 問題 |
No.1529 Constant Lcm
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-01-31 15:58:42 |
| 言語 | C# (.NET 8.0.404) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,981 bytes |
| コンパイル時間 | 13,517 ms |
| コンパイル使用メモリ | 167,232 KB |
| 実行使用メモリ | 183,124 KB |
| 最終ジャッジ日時 | 2024-06-11 08:50:57 |
| 合計ジャッジ時間 | 9,621 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 21 WA * 3 |
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 (83 ms)。 MSBuild のバージョン 17.9.6+a4ecab324 (.NET) /home/judge/data/code/Main.cs(96,10): warning CS0414: フィールド 'Solver.inf' が割り当てられていますが、値は使用されていません [/home/judge/data/code/main.csproj] 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
using System;
using System.Linq;
using System.Numerics;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using N = System.Int64;
static class Program
{
static public void Main(string[] args)
{
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });
var solver = new Solver();
solver.Solve();
Console.Out.Flush();
}
}
public class Solver
{
public void Solve()
{
int n = ri;
if (n == 2) { Write(1); return; }
else if (n == 3) { Write(2); return; }
else if (n == 4) { Write(12); return; }
ModInt ans = 1;
var isprime = new bool[n];
for (int i = 2; i < n; i++) isprime[i] = true;
int p = 2;
for (; p * p < n; p++)
{
if (!isprime[p]) continue;
for (int j = p * 2; j < n; j += p) isprime[j] = false;
int k = 0;
int a = 0;
int p1 = 1;
while (n % p1 == 0 && p1 * 2 <= n)
{
int b = a;
int p2 = p1;
while (p1 + p2 * p <= n) { b++; p2 *= p; }
k = Math.Max(k, a + b);
a++;
p1 *= p;
}
if (k > 0) ans *= ModInt.Pow(p, k);
}
for (; p < n; p++)
{
if (!isprime[p]) continue;
if (n % p == 0 && p * 2 <= n) ans *= p * p;
else ans *= p;
}
Write(ans);
}
struct ModInt
{
private const long _mod = 998244353;
long Val;
public ModInt(long v) { Val = v; }
public override string ToString() { return Val.ToString(); }
public static implicit operator ModInt(long n)
{
long r = n % _mod;
return new ModInt(r < 0 ? r + _mod : r);
}
public static ModInt operator +(ModInt a, ModInt b)
{
long r = a.Val + b.Val;
return new ModInt(r < _mod ? r : r - _mod);
}
public static ModInt operator -(ModInt a, ModInt b)
{
long r = a.Val - b.Val;
return new ModInt(r < 0 ? r + _mod : r);
}
public static ModInt operator -(ModInt a) { return new ModInt(a.Val == 0 ? 0 : _mod - a.Val); }
public static ModInt operator *(ModInt a, ModInt b) { return new ModInt(a.Val * b.Val % _mod); }
public static ModInt operator /(ModInt a, ModInt b) { return a * b.Inv; }
public static ModInt Pow(ModInt b, long n)
{
long t = b.Val, r = 1;
while (n > 0)
{
if ((n & 1) == 1) r = r * t % _mod;
t = t * t % _mod;
n >>= 1;
}
return new ModInt(r);
}
public ModInt Inv { get { return Pow(Val, _mod - 2); } }
}
long inf = (long)1 << 60;
int ri { get { return (int)sc.Integer(); } }
long rl { get { return sc.Integer(); } }
double rd { get { return sc.Double(); } }
string rs { get { return sc.Scan(); } }
public StreamScanner sc = new StreamScanner(Console.OpenStandardInput());
void WriteJoin<T>(string s, T[] t) { Console.WriteLine(string.Join(s, t)); }
void WriteJoin<T>(string s, List<T> t) { Console.WriteLine(string.Join(s, t)); }
void Write<T>(T t) { Console.WriteLine(t.ToString()); }
void YN(bool t) { Console.WriteLine(t ? "YES" : "NO"); }
void Yn(bool t) { Console.WriteLine(t ? "Yes" : "No"); }
void yn(bool t) { Console.WriteLine(t ? "yes" : "no"); }
}
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 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 double Double() { return double.Parse(Scan()); }
}