#36165 (Java21) No.243 出席番号(2)

提出ソース

結果

問題	No.243 出席番号(2)
ユーザー	tanzaku
提出日時	2015-07-11 10:14:41
言語	Java21 (openjdk 21)
結果	AC
実行時間	144 ms / 2,000 ms
コード長	5,957 bytes
コンパイル時間	2,305 ms
コンパイル使用メモリ	87,660 KB
実行使用メモリ	51,932 KB
最終ジャッジ日時	2024-07-08 02:47:09
合計ジャッジ時間	6,078 ms
ジャッジサーバーID （参考情報）	judge4 / 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	50 ms 50,492 KB
testcase_01	AC	50 ms 50,184 KB
testcase_02	AC	49 ms 50,592 KB
testcase_03	AC	75 ms 51,412 KB
testcase_04	AC	72 ms 51,456 KB
testcase_05	AC	77 ms 51,540 KB
testcase_06	AC	73 ms 51,492 KB
testcase_07	AC	72 ms 51,268 KB
testcase_08	AC	83 ms 51,428 KB
testcase_09	AC	85 ms 51,604 KB
testcase_10	AC	83 ms 51,592 KB
testcase_11	AC	82 ms 51,648 KB
testcase_12	AC	82 ms 51,400 KB
testcase_13	AC	95 ms 51,588 KB
testcase_14	AC	92 ms 51,572 KB
testcase_15	AC	92 ms 51,624 KB
testcase_16	AC	89 ms 51,932 KB
testcase_17	AC	92 ms 51,680 KB
testcase_18	AC	119 ms 51,632 KB
testcase_19	AC	119 ms 51,876 KB
testcase_20	AC	127 ms 51,928 KB
testcase_21	AC	121 ms 51,524 KB
testcase_22	AC	121 ms 51,780 KB
testcase_23	AC	144 ms 51,724 KB
testcase_24	AC	140 ms 51,908 KB
testcase_25	AC	138 ms 51,784 KB
testcase_26	AC	139 ms 51,632 KB
testcase_27	AC	143 ms 51,572 KB
testcase_28	AC	49 ms 50,660 KB
testcase_29	AC	49 ms 50,440 KB
testcase_30	AC	50 ms 50,412 KB
testcase_31	AC	48 ms 50,476 KB
testcase_32	AC	49 ms 50,528 KB

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ソースコード

raw source code


import java.io.*;
import java.math.*;
import java.util.*;

import static java.util.Arrays.*;

public class Main {
	private static final int mod = (int)1e9+7;

	final Random random = new Random(0);
	final IOFast io = new IOFast();

	/// MAIN CODE
	public void run() throws IOException {
//		int TEST_CASE = Integer.parseInt(new String(io.nextLine()).trim());
		int TEST_CASE = 1;
		while(TEST_CASE-- != 0) {
			int n = io.nextInt();
			int[] cnt = new int[5000];
			
			for(int v : io.nextIntArray(n)) {
				cnt[v]++;
			}
			
			long[] fact = new long[n+1];
			fact[0] = 1;
			for(int i = 1; i < fact.length; i++) {
				fact[i] = fact[i-1] * i % mod;
			}
			
			long[] dp = new long[n+1];
			dp[0] = 1;
			for(int i = 0; i < n; i++) {
				for(int j = n - 1; j >= 0; j--) {
					dp[j+1] = (dp[j+1] + dp[j] * cnt[i]) % mod;
				}
			}
			
			long ans = 0;
			for(int i = 0; i <= n; i++) {
				ans += (i%2==0?1:-1) * dp[i] * fact[n-i] % mod;
			}
			io.out.println((ans % mod + mod) % mod);
		}
	}
	
	static int[] montmort(int n, int mod) {
		int[] res = new int[n];
		res[2] = 1;
		for(int i = 3; i < n; i++) {
			int x = res[i - 1] + res[i - 2];
			if(x >= mod) x -= mod;
			res[i] = (int)((i - 1) * x % mod);
		}
		return res;
	}
	
	/// TEMPLATE
	static int gcd(int n, int r) { return r == 0 ? n : gcd(r, n%r); }
	static long gcd(long n, long r) { return r == 0 ? n : gcd(r, n%r); }
	
	static <T> void swap(T[] x, int i, int j) { T t = x[i]; x[i] = x[j]; x[j] = t; }
	static void swap(int[] x, int i, int j) { int t = x[i]; x[i] = x[j]; x[j] = t; }
	
	void main() throws IOException {
		//		IOFast.setFileIO("rle-size.in", "rle-size.out");
		try { run(); }
		catch (EndOfFileRuntimeException e) { }
		io.out.flush();
	}
	public static void main(String[] args) throws IOException { new Main().main(); }
	
	static class EndOfFileRuntimeException extends RuntimeException {
		private static final long serialVersionUID = -8565341110209207657L; }

	static
	public class IOFast {
		private BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		private PrintWriter out = new PrintWriter(System.out);

		void setFileIn(String ins) throws IOException { in.close(); in = new BufferedReader(new FileReader(ins)); }
		void setFileOut(String outs) throws IOException { out.flush(); out.close(); out = new PrintWriter(new FileWriter(outs)); }
		void setFileIO(String ins, String outs) throws IOException { setFileIn(ins); setFileOut(outs); }

		private static int pos, readLen;
		private static final char[] buffer = new char[1024 * 8];
		private static char[] str = new char[500*8*2];
		private static boolean[] isDigit = new boolean[256];
		private static boolean[] isSpace = new boolean[256];
		private static boolean[] isLineSep = new boolean[256];

		static { for(int i = 0; i < 10; i++) { isDigit['0' + i] = true; } isDigit['-'] = true; isSpace[' '] = isSpace['\r'] = isSpace['\n'] = isSpace['\t'] = true; isLineSep['\r'] = isLineSep['\n'] = true; }
		public int read() throws IOException { if(pos >= readLen) { pos = 0; readLen = in.read(buffer); if(readLen <= 0) { throw new EndOfFileRuntimeException(); } } return buffer[pos++]; }
		public int nextInt() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isSpace); int i = 0; int ret = 0; if(str[0] == '-') { i = 1; } for(; i < len; i++) ret = ret * 10 + str[i] - '0'; if(str[0] == '-') { ret = -ret; } return ret; }
		public long nextLong() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isSpace); int i = 0; long ret = 0; if(str[0] == '-') { i = 1; } for(; i < len; i++) ret = ret * 10 + str[i] - '0'; if(str[0] == '-') { ret = -ret; } return ret; }
		public char nextChar() throws IOException { while(true) { final int c = read(); if(!isSpace[c]) { return (char)c; } } }
		int reads(int len, boolean[] accept) throws IOException { try { while(true) { final int c = read(); if(accept[c]) { break; } if(str.length == len) { char[] rep = new char[str.length * 3 / 2]; System.arraycopy(str, 0, rep, 0, str.length); str = rep; } str[len++] = (char)c; } } catch(EndOfFileRuntimeException e) { ; } return len; }
		int reads(char[] cs, int len, boolean[] accept) throws IOException { try { while(true) { final int c = read(); if(accept[c]) { break; } cs[len++] = (char)c; } } catch(EndOfFileRuntimeException e) { ; } return len; }
		public char[] nextLine() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isLineSep); try { if(str[len-1] == '\r') { len--; read(); } } catch(EndOfFileRuntimeException e) { ; } return Arrays.copyOf(str, len); }
		public String nextString() throws IOException { return new String(next()); }
		public char[] next() throws IOException { int len = 0; str[len++] = nextChar(); len = reads(len, isSpace); return Arrays.copyOf(str, len); }
		public int next(char[] cs) throws IOException { int len = 0; cs[len++] = nextChar(); len = reads(cs, len, isSpace); return len; }
		public double nextDouble() throws IOException { return Double.parseDouble(nextString()); }
		public long[] nextLongArray(final int n) throws IOException { final long[] res = new long[n]; for(int i = 0; i < n; i++) { res[i] = nextLong(); } return res; }
		public int[] nextIntArray(final int n) throws IOException { final int[] res = new int[n]; for(int i = 0; i < n; i++) { res[i] = nextInt(); } return res; }
		public int[][] nextIntArray2D(final int n, final int k) throws IOException { final int[][] res = new int[n][]; for(int i = 0; i < n; i++) { res[i] = nextIntArray(k); } return res; }
		public int[][] nextIntArray2DWithIndex(final int n, final int k) throws IOException { final int[][] res = new int[n][k+1]; for(int i = 0; i < n; i++) { for(int j = 0; j < k; j++) { res[i][j] = nextInt(); } res[i][k] = i; } return res; }
		public double[] nextDoubleArray(final int n) throws IOException { final double[] res = new double[n]; for(int i = 0; i < n; i++) { res[i] = nextDouble(); } return res; }
	}
}

yukicoder

結果

テストケース

ソースコード