結果
| 問題 |
No.1529 Constant Lcm
|
| コンテスト | |
| ユーザー |
|
| 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());
}
}