結果

問題 No.129 お年玉(2)
ユーザー uwiuwi
提出日時 2015-08-03 23:40:48
言語 Java21
(openjdk 21)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 3,634 bytes
コンパイル時間 6,053 ms
コンパイル使用メモリ 79,948 KB
実行使用メモリ 49,856 KB
最終ジャッジ日時 2023-08-02 21:39:07
合計ジャッジ時間 10,027 ms
ジャッジサーバーID
(参考情報)
judge12 / judge15
このコードへのチャレンジ(β)

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 43 ms
49,464 KB
testcase_01 AC 44 ms
49,356 KB
testcase_02 AC 42 ms
49,340 KB
testcase_03 AC 41 ms
49,220 KB
testcase_04 AC 41 ms
49,228 KB
testcase_05 WA -
testcase_06 AC 43 ms
49,400 KB
testcase_07 AC 44 ms
49,344 KB
testcase_08 AC 45 ms
49,244 KB
testcase_09 AC 43 ms
49,656 KB
testcase_10 AC 43 ms
47,424 KB
testcase_11 AC 42 ms
49,260 KB
testcase_12 AC 42 ms
49,296 KB
testcase_13 AC 42 ms
49,856 KB
testcase_14 AC 43 ms
49,404 KB
testcase_15 AC 43 ms
49,376 KB
testcase_16 AC 44 ms
49,340 KB
testcase_17 AC 42 ms
49,352 KB
testcase_18 AC 43 ms
49,348 KB
testcase_19 AC 44 ms
49,356 KB
testcase_20 AC 43 ms
49,800 KB
testcase_21 AC 43 ms
49,352 KB
testcase_22 AC 43 ms
49,268 KB
testcase_23 AC 43 ms
49,208 KB
testcase_24 AC 44 ms
49,348 KB
testcase_25 WA -
testcase_26 AC 44 ms
49,236 KB
testcase_27 AC 42 ms
49,340 KB
testcase_28 AC 44 ms
49,452 KB
testcase_29 AC 44 ms
49,464 KB
testcase_30 AC 42 ms
47,424 KB
testcase_31 AC 41 ms
49,652 KB
testcase_32 AC 42 ms
49,448 KB
testcase_33 AC 42 ms
49,348 KB
testcase_34 AC 41 ms
49,204 KB
testcase_35 AC 42 ms
49,264 KB
testcase_36 AC 42 ms
49,224 KB
testcase_37 AC 42 ms
49,416 KB
testcase_38 AC 42 ms
49,544 KB
testcase_39 AC 44 ms
49,348 KB
testcase_40 AC 44 ms
49,164 KB
testcase_41 AC 44 ms
49,396 KB
testcase_42 AC 44 ms
49,160 KB
testcase_43 AC 43 ms
49,404 KB
testcase_44 AC 46 ms
49,372 KB
testcase_45 AC 44 ms
49,352 KB
testcase_46 AC 42 ms
49,352 KB
testcase_47 AC 44 ms
49,348 KB
testcase_48 AC 45 ms
49,392 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

package q1xx;

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 Q143X {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		long n = nl()/1000;
		int m = ni();
		int o = (int)(n%m);
		int e2 = 0, e5 = 0;
		int mod = 1000000000;
		long num = 1;
		for(int i = m-o+1;i <= m;i++){
			int j = i;
			while(j % 2 == 0){e2++; j /= 2; }
			while(j % 5 == 0){e5++; j /= 5; }
			num = num * j % mod;
		}
		long den = 1;
		for(int i = 1;i <= o;i++){
			int j = i;
			while(j % 2 == 0){e2--; j /= 2; }
			while(j % 5 == 0){e5--; j /= 5; }
			den = den * j % mod;
		}
		
		long ret = num * invl(den, mod) % mod;
		for(int i = 1;i <= e2 && i <= 9;i++)ret = ret * 2 % mod;
		for(int i = 1;i <= e5 && i <= 9;i++)ret = ret * 5 % mod;
		out.println(ret);
	}
	
	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;
	}
	
	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 Q143X().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)); }
}
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