結果
問題 | No.1529 Constant Lcm |
ユーザー | 37zigen |
提出日時 | 2021-06-04 20:45:11 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 99 ms / 3,000 ms |
コード長 | 2,700 bytes |
コンパイル時間 | 3,177 ms |
コンパイル使用メモリ | 78,648 KB |
実行使用メモリ | 39,248 KB |
最終ジャッジ日時 | 2024-11-19 10:11:21 |
合計ジャッジ時間 | 5,212 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 24 |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.Arrays; import java.util.NoSuchElementException; import java.util.Random; public class Main { public static void main(String[] args) { new Main().run(); } long gcd(long a, long b) { return b==0?a:gcd(b, a%b); } long lcm(long a, long b) { return a/gcd(a, b)*b; } final long p=998244353; void run() { FastScanner sc = new FastScanner(); long ans=1; int N=sc.nextInt(); boolean[] isPrime=new boolean[N]; Arrays.fill(isPrime, true); isPrime[0]=isPrime[1]=false; for (int i=2;i<isPrime.length;++i) { if (!isPrime[i]) continue; long pe=i; while (pe*i<=N-1) pe*=i; long pe2=1; while (N%(pe2*i)==0) pe2*=i; pe2=Math.min(pe2, pe); ans=ans*pe%p*pe2%p; for (int j=2*i;j<isPrime.length;j+=i) { isPrime[j]=false; } } System.out.println(ans); } static void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } public boolean hasNext() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next()); } }