#88936 (Java21) No.368 LCM of K-products

提出ソース

結果

問題	No.368 LCM of K-products
ユーザー	uwi
提出日時	2016-04-29 22:45:26
言語	Java21 (openjdk 21)
結果	AC
実行時間	323 ms / 2,000 ms
コード長	5,173 bytes
コンパイル時間	3,785 ms
コンパイル使用メモリ	85,528 KB
実行使用メモリ	59,488 KB
最終ジャッジ日時	2023-10-23 21:09:06
合計ジャッジ時間	10,728 ms
ジャッジサーバーID （参考情報）	judge14 / judge15

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テストケース

テストケース表示

入力	結果	実行時間実行使用メモリ
testcase_00	AC	268 ms 59,052 KB
testcase_01	AC	302 ms 58,632 KB
testcase_02	AC	171 ms 56,172 KB
testcase_03	AC	277 ms 59,164 KB
testcase_04	AC	273 ms 59,488 KB
testcase_05	AC	259 ms 58,536 KB
testcase_06	AC	57 ms 53,580 KB
testcase_07	AC	65 ms 53,564 KB
testcase_08	AC	58 ms 53,568 KB
testcase_09	AC	58 ms 52,596 KB
testcase_10	AC	59 ms 53,576 KB
testcase_11	AC	59 ms 53,580 KB
testcase_12	AC	75 ms 54,664 KB
testcase_13	AC	223 ms 58,808 KB
testcase_14	AC	288 ms 59,344 KB
testcase_15	AC	285 ms 58,680 KB
testcase_16	AC	257 ms 58,840 KB
testcase_17	AC	246 ms 58,720 KB
testcase_18	AC	323 ms 58,968 KB
testcase_19	AC	148 ms 58,336 KB
testcase_20	AC	238 ms 58,968 KB
testcase_21	AC	128 ms 58,508 KB
testcase_22	AC	263 ms 58,936 KB
testcase_23	AC	59 ms 53,564 KB
testcase_24	AC	57 ms 53,568 KB
testcase_25	AC	63 ms 54,388 KB
testcase_26	AC	57 ms 51,524 KB
testcase_27	AC	78 ms 54,652 KB
testcase_28	AC	61 ms 53,568 KB
testcase_29	AC	79 ms 55,112 KB
testcase_30	AC	74 ms 54,400 KB
testcase_31	AC	64 ms 54,400 KB
testcase_32	AC	74 ms 54,396 KB
testcase_33	AC	165 ms 58,660 KB
testcase_34	AC	249 ms 58,764 KB

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ソースコード

raw source code

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class Q1048 {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		int n = ni(), K = ni();
		int[] a = na(n);
		int[] primes = sieveEratosthenes(100000);
		long ret = 1;
		int mod = 1000000007;
		for(int p : primes){
			int[] es = new int[n];
			for(int i = 0;i < n;i++){
				while(a[i] % p == 0){
					a[i] /= p;
					es[i]++;
				}
			}
			Arrays.sort(es);
			int d = 0;
			for(int i = 0;i < K;i++){
				d += es[n-1-i];
			}
			ret = ret * pow(p, d, mod) % mod;
		}
		
		for(int z = 0;z < n;z++){
			if(a[z] > 1){
				int p = a[z];
				int[] es = new int[n];
				for(int i = 0;i < n;i++){
					while(a[i] % p == 0){
						a[i] /= p;
						es[i]++;
					}
				}
				Arrays.sort(es);
				int d = 0;
				for(int i = 0;i < K;i++){
					d += es[n-1-i];
				}
				ret = ret * pow(p, d, mod) % mod;
			}
		}
		out.println(ret);
	}
	
	public static long pow(long a, long n, long mod) {
		//		a %= mod;
		long ret = 1;
		int x = 63 - Long.numberOfLeadingZeros(n);
		for (; x >= 0; x--) {
			ret = ret * ret % mod;
			if (n << 63 - x < 0)
				ret = ret * a % mod;
		}
		return ret;
	}
	
	public static int[] sieveEratosthenes(int n) {
		if (n <= 32) {
			int[] primes = { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 };
			for (int i = 0; i < primes.length; i++) {
				if (n < primes[i]) {
					return Arrays.copyOf(primes, i);
				}
			}
			return primes;
		}

		int u = n + 32;
		double lu = Math.log(u);
		int[] ret = new int[(int) (u / lu + u / lu / lu * 1.5)];
		ret[0] = 2;
		int pos = 1;

		int[] isnp = new int[(n + 1) / 32 / 2 + 1];
		int sup = (n + 1) / 32 / 2 + 1;

		int[] tprimes = { 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 };
		for (int tp : tprimes) {
			ret[pos++] = tp;
			int[] ptn = new int[tp];
			for (int i = (tp - 3) / 2; i < tp << 5; i += tp)
				ptn[i >> 5] |= 1 << (i & 31);
			for (int j = 0; j < sup; j += tp) {
				for (int i = 0; i < tp && i + j < sup; i++) {
					isnp[j + i] |= ptn[i];
				}
			}
		}

		// 3,5,7
		// 2x+3=n
		int[] magic = { 0, 1, 23, 2, 29, 24, 19, 3, 30, 27, 25, 11, 20, 8, 4,
				13, 31, 22, 28, 18, 26, 10, 7, 12, 21, 17, 9, 6, 16, 5, 15, 14 };
		int h = n / 2;
		for (int i = 0; i < sup; i++) {
			for (int j = ~isnp[i]; j != 0; j &= j - 1) {
				int pp = i << 5 | magic[(j & -j) * 0x076be629 >>> 27];
				int p = 2 * pp + 3;
				if (p > n)
					break;
				ret[pos++] = p;
				if ((long) p * p > n)
					continue;
				for (int q = (p * p - 3) / 2; q <= h; q += p)
					isnp[q >> 5] |= 1 << q;
			}
		}

		return Arrays.copyOf(ret, pos);
	}
	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
	}
	
	public static void main(String[] args) throws Exception { new Q1048().run(); }
	
	private byte[] inbuf = new byte[1024];
	private int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private char[][] nm(int n, int m)
	{
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private int ni()
	{
		int num = 0, b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}

yukicoder

結果

テストケース

ソースコード