結果
問題 | No.1302 Random Tree Score |
ユーザー | uwi |
提出日時 | 2020-11-27 22:05:26 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 1,309 ms / 3,000 ms |
コード長 | 19,939 bytes |
コンパイル時間 | 5,029 ms |
コンパイル使用メモリ | 93,328 KB |
実行使用メモリ | 83,448 KB |
最終ジャッジ日時 | 2024-07-26 12:52:56 |
合計ジャッジ時間 | 19,241 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 14 |
ソースコード
package contest201127;import java.io.*;import java.util.ArrayDeque;import java.util.Arrays;import java.util.InputMismatchException;import java.util.Queue;public class E {InputStream is;FastWriter out;String INPUT = "";public void solve(){int n = ni();final int mod = 998244353;int[][] fif = enumFIF(n, mod);long[] a = new long[n-1];for(int i = 1;i <= n-1;i++){a[i-1] = (long)fif[1][i-1] * i % mod;}// 2n-2 - nlong[] b = pow(a, n);out.println(b[n-2] * fif[0][n-2] % mod * invl(pow(n, n-2, mod), mod) % mod);}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 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 final int mod = 998244353;public static final int G = 3;// only 998244353public static long[] mul(long[] a, long[] b){return Arrays.copyOf(NTTStockham998244353.convolute(a, b), a.length+b.length-1);}public static long[] mul(long[] a, long[] b, int lim){return Arrays.copyOf(NTTStockham998244353.convolute(a, b), lim);}// public static final int mod = 1000000007;// public static long[] mul(long[] a, long[] b)// {// if(Math.max(a.length, b.length) >= 3000){// return Arrays.copyOf(NTTCRT.convolute(a, b, 3, mod), a.length+b.length-1);// }else{// return mulnaive(a, b);// }// }// public static long[] mul(long[] a, long[] b, int lim)// {// if(Math.max(a.length, b.length) >= 3000){// return Arrays.copyOf(NTTCRT.convolute(a, b, 3, mod), lim);// }else{// return mulnaive(a, b, lim);// }// }public static final long big = (Long.MAX_VALUE/mod/mod-1)*mod*mod;public static long[] mulnaive(long[] a, long[] b){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 long[] mulnaive(long[] a, long[] b, int lim){long[] c = new long[lim];for(int i = 0;i < a.length;i++){for(int j = 0;j < b.length && i+j < lim;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 long[] mul_(long[] a, long k){for(int i = 0;i < a.length;i++)a[i] = a[i] * k % mod;return a;}public static long[] mul(long[] a, long k){a = Arrays.copyOf(a, a.length);for(int i = 0;i < a.length;i++)a[i] = a[i] * k % mod;return a;}public static long[] add(long[] a, long[] b){long[] c = new long[Math.max(a.length, b.length)];for(int i = 0;i < a.length;i++)c[i] += a[i];for(int i = 0;i < b.length;i++)c[i] += b[i];for(int i = 0;i < c.length;i++)if(c[i] >= mod)c[i] -= mod;return c;}public static long[] add(long[] a, long[] b, int lim){long[] c = new long[lim];for(int i = 0;i < a.length && i < lim;i++)c[i] += a[i];for(int i = 0;i < b.length && i < lim;i++)c[i] += b[i];for(int i = 0;i < c.length;i++)if(c[i] >= mod)c[i] -= mod;return c;}public static long[] sub(long[] a, long[] b){long[] c = new long[Math.max(a.length, b.length)];for(int i = 0;i < a.length;i++)c[i] += a[i];for(int i = 0;i < b.length;i++)c[i] -= b[i];for(int i = 0;i < c.length;i++)if(c[i] < 0)c[i] += mod;return c;}public static long[] sub(long[] a, long[] b, int lim){long[] c = new long[lim];for(int i = 0;i < a.length && i < lim;i++)c[i] += a[i];for(int i = 0;i < b.length && i < lim;i++)c[i] -= b[i];for(int i = 0;i < c.length;i++)if(c[i] < 0)c[i] += mod;return c;}// F_{t+1}(x) = -F_t(x)^2*P(x) + 2F_t(x)// if want p-destructive, comment out flipping p just before returning.public static long[] inv(long[] p){int n = p.length;long[] f = {invl(p[0], mod)};for(int i = 0;i < p.length;i++){if(p[i] == 0)continue;p[i] = mod-p[i];}for(int i = 1;i < 2*n;i*=2){long[] f2 = mul(f, f, Math.min(n, 2*i));long[] f2p = mul(f2, Arrays.copyOf(p, i), Math.min(n, 2*i));for(int j = 0;j < f.length;j++){f2p[j] += 2L*f[j];if(f2p[j] >= mod)f2p[j] -= mod;if(f2p[j] >= mod)f2p[j] -= mod;}f = f2p;}for(int i = 0;i < p.length;i++){if(p[i] == 0)continue;p[i] = mod-p[i];}return f;}// differentiatepublic static long[] d(long[] p){long[] q = new long[p.length];for(int i = 0;i < p.length-1;i++){q[i] = p[i+1] * (i+1) % mod;}return q;}// integratepublic static long[] i(long[] p){long[] q = new long[p.length];for(int i = 0;i < p.length-1;i++){q[i+1] = p[i] * invl(i+1, mod) % mod;}return q;}static long[] exp(long[] a) { return exp(a, a.length); }/*** https://cs.uwaterloo.ca/~eschost/publications/BoSc09-final.pdf* @verified https://judge.yosupo.jp/problem/exp_of_formal_power_series* @param a* @param lim* @return*/static long[] exp(long[] a, int lim){long[] F = {1L};long[] G = {1L};long[] da = d(a);for(int m = 1;;m *= 2) {long[] G2 = mul(G, G, m);G = sub(mul_(G, 2), mul(F, G2, m));long[] Q = Arrays.copyOf(da, m-1);long[] W = add(Q, mul(G, sub(d(F), mul(F, Q, m), m-1)));F = mul(F, add(new long[] {1}, sub(Arrays.copyOf(a, m), i(W))), m);if(m >= lim)break;}return Arrays.copyOf(F, lim);}//// // F_{t+1}(x) = F_t(x)-(ln F_t(x) - P(x)) * F_t(x)// public static long[] exp(long[] p)// {// int n = p.length;// long[] f = {p[0]};// for(int i = 1;i < 2*n;i*=2){// long[] ii = ln(f);// long[] sub = sub(ii, p, Math.min(n, 2*i));// if(--sub[0] < 0)sub[0] += mod;// for(int j = 0;j < 2*i && j < n;j++){// sub[j] = mod-sub[j];// if(sub[j] == mod)sub[j] = 0;// }// f = mul(sub, f, Math.min(n, 2*i));//// f = sub(f, mul(sub(ii, p, 2*i), f, 2*i));// }// return f;// }// \int f'(x)/f(x) dxpublic static long[] ln(long[] f){return i(mul(d(f), inv(f)));}// ln F(x) - k ln P(x) = 0public static long[] pow(long[] p, long K){int n = p.length;int tz = trailingZeros(p);if((long)tz*K >= n)return new long[n];long[] pa = Arrays.copyOfRange(p, tz, n);int m = pa.length;// pa[0] must be 1long base = pa[0];long scale = invl(base, mod);for(int i = 0;i < m;i++)pa[i] = pa[i] * scale % mod;long[] lnp = Arrays.copyOf(ln(pa), m);for(int i = 0;i < m;i++)lnp[i] = lnp[i] * K % mod;long[] reta = exp(lnp);long kscale = pow(base, K, mod);for(int i = 0;i < m;i++)reta[i] = reta[i] * kscale % mod;long[] ret = new long[n];System.arraycopy(reta, 0, ret, (int)(tz*K), (int)(n-tz*K));return ret;}public static int trailingZeros(long[] a){int ret = 0;for(long v : a) {if(v == 0) {ret++;}else {break;}}return ret;}public static class NTTStockham998244353 {private static final int P = 998244353, mod = P, G = 3;private static long[] wps;public static long[] convolute(long[] a, long[] b){int m = Math.max(2, Integer.highestOneBit(Math.max(a.length, b.length)-1)<<2);wps = new long[m];long unit = pow(G, (P-1)/m);wps[0] = 1;for(int p = 1;p < m;p++) {wps[p] = wps[p-1] * unit % mod;}long[] fa = go(a, m, false);long[] fb = a == b ? fa : go(b, m, false);for(int i = 0;i < m;i++){fa[i] = fa[i]*fb[i] % mod;}fa = go(fa, m, true);for(int i = 1, j = m-1;i < j;i++,j--) {long d = fa[i]; fa[i] = fa[j]; fa[j] = d;}return fa;}private static void fft(long[] X, long[] Y){int s = 1;boolean eo = false;for(int n = X.length;n >= 4;n /= 2) {int m = n/2;for(int p = 0;p < m;p++) {long wp = wps[s*p];for(int q = 0;q < s;q++) {long a = X[q + s*(p+0)];long b = X[q + s*(p+m)];Y[q + s*(2*p+0)] = (a+b) % P;Y[q + s*(2*p+1)] = (a-b+P) * wp % P;}}s *= 2;eo = !eo;long[] D = X; X = Y; Y = D;}long[] z = eo ? Y : X;for(int q = 0;q < s;q++) {long a = X[q + 0];long b = X[q + s];z[q+0] = (a+b) % P;z[q+s] = (a-b+P) % P;}}private static long[] go(long[] src, int n, boolean inverse){long[] dst = Arrays.copyOf(src, n);fft(dst, new long[n]);if(inverse){long in = invl(n);for(int i = 0;i < n;i++){dst[i] = dst[i] * in % mod;}}return dst;}private static long pow(long a, long n) {// a %= mod;long ret = 1;int x = 63 - Long.numberOfLeadingZeros(n);for (; x >= 0; x--) {ret = ret*ret % mod;if (n<<~x<0)ret = ret*a%mod;}return ret;}private static long invl(long a) {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 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 void main(String[] args) {new E().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 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(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 println(int... xs) { return writeln(xs); }public FastWriter println(long... xs) { return writeln(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 1public 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)); }}