#657769 (Java21) No.1510 Simple Integral

提出ソース

結果

問題	No.1510 Simple Integral
ユーザー	uwi
提出日時	2021-05-15 01:16:21
言語	Java21 (openjdk 21)
結果	AC
実行時間	184 ms / 2,000 ms
コード長	18,072 bytes
コンパイル時間	5,403 ms
コンパイル使用メモリ	101,556 KB
実行使用メモリ	54,392 KB
最終ジャッジ日時	2024-10-02 08:03:34
合計ジャッジ時間	13,562 ms
ジャッジサーバーID （参考情報）	judge3 / judge5

このコードへのチャレンジ
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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	78 ms 50,904 KB
testcase_01	AC	79 ms 51,244 KB
testcase_02	AC	78 ms 51,188 KB
testcase_03	AC	78 ms 51,244 KB
testcase_04	AC	77 ms 51,068 KB
testcase_05	AC	80 ms 50,992 KB
testcase_06	AC	180 ms 54,272 KB
testcase_07	AC	173 ms 53,232 KB
testcase_08	AC	170 ms 54,200 KB
testcase_09	AC	172 ms 54,392 KB
testcase_10	AC	173 ms 54,228 KB
testcase_11	AC	174 ms 53,324 KB
testcase_12	AC	172 ms 54,128 KB
testcase_13	AC	180 ms 54,140 KB
testcase_14	AC	173 ms 54,080 KB
testcase_15	AC	176 ms 54,312 KB
testcase_16	AC	176 ms 54,224 KB
testcase_17	AC	176 ms 54,348 KB
testcase_18	AC	184 ms 54,336 KB
testcase_19	AC	175 ms 54,216 KB
testcase_20	AC	176 ms 54,276 KB
testcase_21	AC	179 ms 54,224 KB
testcase_22	AC	176 ms 54,020 KB
testcase_23	AC	174 ms 53,656 KB
testcase_24	AC	175 ms 54,212 KB
testcase_25	AC	175 ms 54,316 KB
testcase_26	AC	175 ms 54,292 KB
testcase_27	AC	177 ms 54,156 KB
testcase_28	AC	174 ms 54,316 KB
testcase_29	AC	175 ms 54,080 KB
testcase_30	AC	176 ms 54,264 KB
testcase_31	AC	174 ms 54,288 KB
testcase_32	AC	183 ms 54,248 KB
testcase_33	AC	179 ms 54,272 KB
testcase_34	AC	177 ms 54,140 KB
testcase_35	AC	183 ms 54,388 KB
testcase_36	AC	181 ms 54,272 KB
testcase_37	AC	182 ms 54,060 KB
testcase_38	AC	179 ms 54,316 KB
testcase_39	AC	180 ms 54,224 KB
testcase_40	AC	179 ms 54,324 KB
testcase_41	AC	179 ms 54,092 KB
testcase_42	AC	177 ms 54,300 KB
testcase_43	AC	78 ms 51,164 KB
testcase_44	AC	72 ms 50,960 KB
testcase_45	AC	106 ms 52,624 KB

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ソースコード

raw source code

package contest210514;
import java.io.*;
import java.util.*;
import java.util.function.IntUnaryOperator;
import java.util.function.LongUnaryOperator;

public class G {
	InputStream is;
	FastWriter out;

	String INPUT = "";

	static class FactorPower
	{
		int e;
		long[] a;

		public FactorPower(int e, long[] a) {
			this.e = e;
			this.a = a;
		}
	}

	static final int mod = 998244353;

	static class PartialFractionDecompositionResult
	{
		FactorPower fp;
		long[][] nums;

		public PartialFractionDecompositionResult(FactorPower fp, long[][] nums) {
			this.fp = fp;
			this.nums = nums;
		}
	}

	static List<PartialFractionDecompositionResult> partialFractionDecomposition(FactorPower... fs)
	{
		long[] all = {1};
		int esum = 0;
		for(FactorPower fp : fs){
			for(int i = 0;i < fp.e;i++) {
				all = mulnaive(all, fp.a, mod);
				esum += fp.a.length-1;
			}
		}

		int[][] M = new int[esum+1][esum];

		int gen = 0;
		for(FactorPower fp : fs){
			long[] my = all;
			for(int i = 1;i <= fp.e;i++) {
				my = divnaive(my, fp.a, mod)[0];
				for(int j = 0;j < fp.a.length-1;j++){
					for(int k = 0;k < my.length;k++){
						M[k+j][gen] += my[k];
					}
					gen++;
				}
			}
		}
		assert gen == esum;

		int[] v = new int[esum+1];
		v[0] = 1;
		Result res = gaussElimination(M, v, mod);
//		tr(res.sol);

		List<PartialFractionDecompositionResult> ret = new ArrayList<>();

		gen = 0;
		for(FactorPower fp : fs){
			long[][] ps = new long[fp.e][];
			for(int i = 1;i <= fp.e;i++) {
				long[] lf = new long[fp.a.length-1];
				for(int j = 0;j < fp.a.length-1;j++){
					lf[j] = res.sol[gen++];
				}
				ps[i-1] = lf;
			}
			ret.add(new PartialFractionDecompositionResult(fp, ps));
		}
		return ret;
	}

	public static Result gaussElimination(int[][] M, int[] v, int mod)
	{
		int n = M.length, m = M[0].length;
		int[] head = new int[n];

		// if not needed, comment out.
		for(int[] row : M){
			for(int i = 0;i < row.length;i++){
				row[i] %= mod;
				if(row[i] < 0)row[i] += mod;
			}
		}

		// Forward Elimination
		int row = 0;
		for(int col = 0;col < m;col++){
			// select pivot
			boolean pivotFound = false;
			out:
			for(int prow = row;prow < n;prow++){
				if(M[prow][col] != 0){
					// pivot found
					if(prow != row){
						// swap rows
						for(int k = 0;k < m;k++){
							int u = M[prow][k]; M[prow][k] = M[row][k]; M[row][k] = u;
						}
						int dum = v[prow]; v[prow] = v[row]; v[row] = dum;
					}
					pivotFound = true;
					break out;
				}
			}
			if(!pivotFound)continue;
			head[row] = col;

			// diag to 1
			long imul = invl(M[row][col], mod);
			for(int k = 0;k < m;k++){
				M[row][k] = (int)(M[row][k] * imul % mod);
			}
			v[row] = (int)(v[row] * imul % mod);

			for(int j = row+1;j < n;j++){
				if(M[j][col] != 0){
					long mul = mod-M[j][col];
					for(int k = col;k < m;k++){
						M[j][k] = (int)((M[j][k] + M[row][k] * mul) % mod);
					}
					v[j] = (int)((v[j] + v[row] * mul) % mod);
				}
			}
			row++;
		}

		Result ret = new Result();
		ret.mat = M;
		for(int i = row;i < n;i++){
			if(v[i] != 0){
				ret.rank = row;
				ret.exists = false;
				return ret;
			}
		}

		for(int i = row-1;i >= 0;i--){
			for(int j = i-1;j >= 0;j--){
				if(M[j][head[i]] != 0){
					long mul = mod-M[j][head[i]];
					for(int k = head[i];k < m;k++){
						M[j][k] = (int)((M[j][k] + M[i][k] * mul) % mod);
					}
					v[j] = (int)((v[j] + v[i] * mul) % mod);
				}
			}
		}

		int[] retv = new int[m];
		for(int i = 0;i < row;i++){
			retv[head[i]] = v[i];
		}

		ret.sol = retv;
		ret.rank = row;
		ret.exists = true;
		return ret;
	}

	public static class Result
	{
		public int[][] mat;
		public int[] sol;
		public int rank;
		public boolean exists;
	}

	public static int[][] uniqcount(int[] a)
	{
		int n = a.length;
		int p = 0;
		int[][] b = new int[n][];
		for(int i = 0;i < n;i++){
			if(i == 0 || a[i] != a[i-1])b[p++] = new int[]{a[i], 0};
			b[p-1][1]++;
		}
		return Arrays.copyOf(b, p);
	}


	public void solve()
	{
		int n = ni();
		int[] a = na(n);

		Arrays.sort(a);
		int[][] u = uniqcount(a);

		FactorPower[] fps = new FactorPower[u.length];
		for(int i = 0;i < u.length;i++) {
			fps[i] = new FactorPower(u[i][1], new long[]{(long) u[i][0] * u[i][0] % mod, 0, 1});
		}
		List<PartialFractionDecompositionResult> res = partialFractionDecomposition(fps);

		// 1 1: pi*1/1/a
		// 1 2: pi*1/2/a^3
		// 1 3: pi:3/8/a^5
		// (2n)!/2^{2n}/(n!)^2 <- n-1
		int[][] fif = enumFIF(1000, mod);
		long[] cos = new long[500];

		for(int i = 1;i <= 499;i++){
			cos[i] = fif[0][2*i-2] * invl(pow(2, 2*(i-1), mod), mod) % mod
					* fif[1][i-1] % mod * fif[1][i-1] % mod;
		}

		long ans = 0;
		for(int j = 0;j < res.size();j++){
			PartialFractionDecompositionResult re = res.get(j);
			for(int i = 1;i <= re.fp.e;i++){
				ans += cos[i] * invl(pow(u[j][0], 2*i-1, mod), mod) % mod * re.nums[i-1][0];
				ans %= mod;
			}
		}
		out.println(ans);
	}

	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[][] enumFIF(int n, int mod) {
		int[] f = new int[n + 1];
		int[] invf = new int[n + 1];
		f[0] = 1;
		for (int i = 1; i <= n; i++) {
			f[i] = (int) ((long) f[i - 1] * i % mod);
		}
		long a = f[n];
		long b = mod;
		long p = 1, q = 0;
		while (b > 0) {
			long c = a / b;
			long d;
			d = a;
			a = b;
			b = d % b;
			d = p;
			p = q;
			q = d - c * q;
		}
		invf[n] = (int) (p < 0 ? p + mod : p);
		for (int i = n - 1; i >= 0; i--) {
			invf[i] = (int) ((long) invf[i + 1] * (i + 1) % mod);
		}
		return new int[][]{f, invf};
	}


	public static long invl(long a, long mod) {
		long b = mod;
		long p = 1, q = 0;
		while (b > 0) {
			long c = a / b;
			long d;
			d = a;
			a = b;
			b = d % b;
			d = p;
			p = q;
			q = d - c * q;
		}
		return p < 0 ? p + mod : p;
	}


	public static long[][] divnaive(long[] a, long[] b, int mod)
	{
		int n = a.length, m = b.length;
		if(n-m+1 <= 0)return new long[][]{new long[0], Arrays.copyOf(a, n)};
		long[] r = Arrays.copyOf(a, n);
		long[] q = new long[n-m+1];
		long ib = invl(b[m-1], mod);
		for(int i = n-1;i >= m-1;i--){
			long x = ib * r[i] % mod;
			q[i-(m-1)] = x;
			for(int j = m-1;j >= 0;j--){
				r[i+j-(m-1)] -= b[j]*x;
				r[i+j-(m-1)] %= mod;
				if(r[i+j-(m-1)] < 0)r[i+j-(m-1)] += mod;
				//				r[i+j-(m-1)] = modh(r[i+j-(m-1)]+(long)mod*mod - b[j]*x, MM, HH, mod);
			}
		}
		return new long[][]{q, Arrays.copyOf(r, m-1)};
	}


	public static long[] mulnaive(long[] a, long[] b, int mod)
	{
		final long big = (Long.MAX_VALUE/mod/mod-1)*mod*mod;

		long[] c = new long[a.length+b.length-1];
		for(int i = 0;i < a.length;i++){
			for(int j = 0;j < b.length;j++){
				c[i+j] += a[i]*b[j];
				if(c[i+j] >= big)c[i+j] -= big;
			}
		}
		for(int i = 0;i < c.length;i++)c[i] %= mod;
		return c;
	}


	public static void main(String[] args) {
		new G().run();
	}

	public void run()
	{
		long S = System.currentTimeMillis();
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new FastWriter(System.out);

		solve();
		out.flush();
		long G = System.currentTimeMillis();
		tr(G-S+"ms");
		//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
		//			@Override
		//			public void run() {
		//				long s = System.currentTimeMillis();
		//				solve();
		//				out.flush();
		//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
		//			}
		//		};
		//		t.start();
		//		t.join();
	}

	private boolean eof()
	{
		if(lenbuf == -1)return true;
		int lptr = ptrbuf;
		while(lptr < lenbuf)if(!isSpaceChar(inbuf[lptr++]))return false;

		try {
			is.mark(1000);
			while(true){
				int b = is.read();
				if(b == -1){
					is.reset();
					return true;
				}else if(!isSpaceChar(b)){
					is.reset();
					return false;
				}
			}
		} catch (IOException e) {
			return true;
		}
	}

	private final byte[] inbuf = new byte[1024];
	public 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 boolean isSpaceChar(int c) { return !(c >= 32 && 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))){
			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 long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		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();
		}
	}

	public static class FastWriter
	{
		private static final int BUF_SIZE = 1<<13;
		private final byte[] buf = new byte[BUF_SIZE];
		private final OutputStream out;
		private int ptr = 0;

		private FastWriter(){out = null;}

		public FastWriter(OutputStream os)
		{
			this.out = os;
		}

		public FastWriter(String path)
		{
			try {
				this.out = new FileOutputStream(path);
			} catch (FileNotFoundException e) {
				throw new RuntimeException("FastWriter");
			}
		}

		public FastWriter write(byte b)
		{
			buf[ptr++] = b;
			if(ptr == BUF_SIZE)innerflush();
			return this;
		}

		public FastWriter write(char c)
		{
			return write((byte)c);
		}

		public FastWriter write(char[] s)
		{
			for(char c : s){
				buf[ptr++] = (byte)c;
				if(ptr == BUF_SIZE)innerflush();
			}
			return this;
		}

		public FastWriter write(String s)
		{
			s.chars().forEach(c -> {
				buf[ptr++] = (byte)c;
				if(ptr == BUF_SIZE)innerflush();
			});
			return this;
		}

		private static int countDigits(int l) {
			if (l >= 1000000000) return 10;
			if (l >= 100000000) return 9;
			if (l >= 10000000) return 8;
			if (l >= 1000000) return 7;
			if (l >= 100000) return 6;
			if (l >= 10000) return 5;
			if (l >= 1000) return 4;
			if (l >= 100) return 3;
			if (l >= 10) return 2;
			return 1;
		}

		public FastWriter write(int x)
		{
			if(x == Integer.MIN_VALUE){
				return write((long)x);
			}
			if(ptr + 12 >= BUF_SIZE)innerflush();
			if(x < 0){
				write((byte)'-');
				x = -x;
			}
			int d = countDigits(x);
			for(int i = ptr + d - 1;i >= ptr;i--){
				buf[i] = (byte)('0'+x%10);
				x /= 10;
			}
			ptr += d;
			return this;
		}

		private static int countDigits(long l) {
			if (l >= 1000000000000000000L) return 19;
			if (l >= 100000000000000000L) return 18;
			if (l >= 10000000000000000L) return 17;
			if (l >= 1000000000000000L) return 16;
			if (l >= 100000000000000L) return 15;
			if (l >= 10000000000000L) return 14;
			if (l >= 1000000000000L) return 13;
			if (l >= 100000000000L) return 12;
			if (l >= 10000000000L) return 11;
			if (l >= 1000000000L) return 10;
			if (l >= 100000000L) return 9;
			if (l >= 10000000L) return 8;
			if (l >= 1000000L) return 7;
			if (l >= 100000L) return 6;
			if (l >= 10000L) return 5;
			if (l >= 1000L) return 4;
			if (l >= 100L) return 3;
			if (l >= 10L) return 2;
			return 1;
		}

		public FastWriter write(long x)
		{
			if(x == Long.MIN_VALUE){
				return write("" + x);
			}
			if(ptr + 21 >= BUF_SIZE)innerflush();
			if(x < 0){
				write((byte)'-');
				x = -x;
			}
			int d = countDigits(x);
			for(int i = ptr + d - 1;i >= ptr;i--){
				buf[i] = (byte)('0'+x%10);
				x /= 10;
			}
			ptr += d;
			return this;
		}

		public FastWriter write(double x, int precision)
		{
			if(x < 0){
				write('-');
				x = -x;
			}
			x += Math.pow(10, -precision)/2;
			//		if(x < 0){ x = 0; }
			write((long)x).write(".");
			x -= (long)x;
			for(int i = 0;i < precision;i++){
				x *= 10;
				write((char)('0'+(int)x));
				x -= (int)x;
			}
			return this;
		}

		public FastWriter writeln(char c){ return write(c).writeln(); }
		public FastWriter writeln(int x){ return write(x).writeln(); }
		public FastWriter writeln(long x){ return write(x).writeln(); }
		public FastWriter writeln(double x, int precision){ return write(x, precision).writeln(); }

		public FastWriter write(int... xs)
		{
			boolean first = true;
			for(int x : xs) {
				if (!first) write(' ');
				first = false;
				write(x);
			}
			return this;
		}

		public FastWriter write(long... xs)
		{
			boolean first = true;
			for(long x : xs) {
				if (!first) write(' ');
				first = false;
				write(x);
			}
			return this;
		}

		public FastWriter write(IntUnaryOperator f, int... xs)
		{
			boolean first = true;
			for(int x : xs) {
				if (!first) write(' ');
				first = false;
				write(f.applyAsInt(x));
			}
			return this;
		}

		public FastWriter write(LongUnaryOperator f, long... xs)
		{
			boolean first = true;
			for(long x : xs) {
				if (!first) write(' ');
				first = false;
				write(f.applyAsLong(x));
			}
			return this;
		}

		public FastWriter writeln()
		{
			return write((byte)'\n');
		}

		public FastWriter writeln(int... xs) { return write(xs).writeln(); }
		public FastWriter writeln(long... xs) { return write(xs).writeln(); }
		public FastWriter writeln(IntUnaryOperator f, int... xs) { return write(f, xs).writeln(); }
		public FastWriter writeln(LongUnaryOperator f, long... xs) { return write(f, xs).writeln(); }
		public FastWriter writeln(char[] line) { return write(line).writeln(); }
		public FastWriter writeln(char[]... map) { for(char[] line : map)write(line).writeln();return this; }
		public FastWriter writeln(String s) { return write(s).writeln(); }

		private void innerflush()
		{
			try {
				out.write(buf, 0, ptr);
				ptr = 0;
			} catch (IOException e) {
				throw new RuntimeException("innerflush");
			}
		}

		public void flush()
		{
			innerflush();
			try {
				out.flush();
			} catch (IOException e) {
				throw new RuntimeException("flush");
			}
		}

		public FastWriter print(byte b) { return write(b); }
		public FastWriter print(char c) { return write(c); }
		public FastWriter print(char[] s) { return write(s); }
		public FastWriter print(String s) { return write(s); }
		public FastWriter print(int x) { return write(x); }
		public FastWriter print(long x) { return write(x); }
		public FastWriter print(double x, int precision) { return write(x, precision); }
		public FastWriter println(char c){ return writeln(c); }
		public FastWriter println(int x){ return writeln(x); }
		public FastWriter println(long x){ return writeln(x); }
		public FastWriter println(double x, int precision){ return writeln(x, precision); }
		public FastWriter print(int... xs) { return write(xs); }
		public FastWriter print(long... xs) { return write(xs); }
		public FastWriter print(IntUnaryOperator f, int... xs) { return write(f, xs); }
		public FastWriter print(LongUnaryOperator f, long... xs) { return write(f, xs); }
		public FastWriter println(int... xs) { return writeln(xs); }
		public FastWriter println(long... xs) { return writeln(xs); }
		public FastWriter println(IntUnaryOperator f, int... xs) { return writeln(f, xs); }
		public FastWriter println(LongUnaryOperator f, long... xs) { return writeln(f, xs); }
		public FastWriter println(char[] line) { return writeln(line); }
		public FastWriter println(char[]... map) { return writeln(map); }
		public FastWriter println(String s) { return writeln(s); }
		public FastWriter println() { return writeln(); }
	}

	public static void trnz(int... o)
	{
		for(int i = 0;i < o.length;i++)if(o[i] != 0)System.out.print(i+":"+o[i]+" ");
		System.out.println();
	}

	// print ids which are 1
	public static void trt(long... o)
	{
		Queue<Integer> stands = new ArrayDeque<>();
		for(int i = 0;i < o.length;i++){
			for(long x = o[i];x != 0;x &= x-1)stands.add(i<<6|Long.numberOfTrailingZeros(x));
		}
		System.out.println(stands);
	}

	public static void tf(boolean... r)
	{
		for(boolean x : r)System.out.print(x?'#':'.');
		System.out.println();
	}

	public static void tf(boolean[]... b)
	{
		for(boolean[] r : b) {
			for(boolean x : r)System.out.print(x?'#':'.');
			System.out.println();
		}
		System.out.println();
	}

	public void tf(long[]... b)
	{
		if(INPUT.length() != 0) {
			for (long[] r : b) {
				for (long x : r) {
					for (int i = 0; i < 64; i++) {
						System.out.print(x << ~i < 0 ? '#' : '.');
					}
				}
				System.out.println();
			}
			System.out.println();
		}
	}

	public void tf(long... b)
	{
		if(INPUT.length() != 0) {
			for (long x : b) {
				for (int i = 0; i < 64; i++) {
					System.out.print(x << ~i < 0 ? '#' : '.');
				}
			}
			System.out.println();
		}
	}

	private void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
//	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