結果

問題 No.491 10^9+1と回文
ユーザー uwiuwi
提出日時 2017-03-10 22:24:30
言語 Java21
(openjdk 21)
結果
AC  
実行時間 84 ms / 1,000 ms
コード長 3,366 bytes
コンパイル時間 3,966 ms
コンパイル使用メモリ 81,268 KB
実行使用メモリ 51,348 KB
最終ジャッジ日時 2024-10-01 07:07:36
合計ジャッジ時間 14,771 ms
ジャッジサーバーID
(参考情報)
judge5 / judge1
このコードへのチャレンジ
(要ログイン)

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 67 ms
51,116 KB
testcase_01 AC 68 ms
51,240 KB
testcase_02 AC 76 ms
50,628 KB
testcase_03 AC 66 ms
50,328 KB
testcase_04 AC 68 ms
51,128 KB
testcase_05 AC 76 ms
50,704 KB
testcase_06 AC 84 ms
51,348 KB
testcase_07 AC 75 ms
50,596 KB
testcase_08 AC 66 ms
50,844 KB
testcase_09 AC 76 ms
50,404 KB
testcase_10 AC 66 ms
50,376 KB
testcase_11 AC 68 ms
50,816 KB
testcase_12 AC 66 ms
50,768 KB
testcase_13 AC 65 ms
51,068 KB
testcase_14 AC 68 ms
51,208 KB
testcase_15 AC 67 ms
51,232 KB
testcase_16 AC 75 ms
50,896 KB
testcase_17 AC 71 ms
51,064 KB
testcase_18 AC 80 ms
51,340 KB
testcase_19 AC 70 ms
50,460 KB
testcase_20 AC 70 ms
50,460 KB
testcase_21 AC 70 ms
51,100 KB
testcase_22 AC 79 ms
50,440 KB
testcase_23 AC 66 ms
50,584 KB
testcase_24 AC 67 ms
50,680 KB
testcase_25 AC 77 ms
50,456 KB
testcase_26 AC 77 ms
50,644 KB
testcase_27 AC 78 ms
50,492 KB
testcase_28 AC 71 ms
50,336 KB
testcase_29 AC 82 ms
51,092 KB
testcase_30 AC 77 ms
50,692 KB
testcase_31 AC 72 ms
50,724 KB
testcase_32 AC 80 ms
50,896 KB
testcase_33 AC 78 ms
51,024 KB
testcase_34 AC 72 ms
50,856 KB
testcase_35 AC 68 ms
50,560 KB
testcase_36 AC 66 ms
51,124 KB
testcase_37 AC 70 ms
51,152 KB
testcase_38 AC 68 ms
50,980 KB
testcase_39 AC 65 ms
50,548 KB
testcase_40 AC 67 ms
50,332 KB
testcase_41 AC 69 ms
50,704 KB
testcase_42 AC 70 ms
50,236 KB
testcase_43 AC 72 ms
50,792 KB
testcase_44 AC 71 ms
50,048 KB
testcase_45 AC 72 ms
51,064 KB
testcase_46 AC 68 ms
50,756 KB
testcase_47 AC 69 ms
50,948 KB
testcase_48 AC 68 ms
50,972 KB
testcase_49 AC 67 ms
50,924 KB
testcase_50 AC 70 ms
50,996 KB
testcase_51 AC 80 ms
50,980 KB
testcase_52 AC 68 ms
51,152 KB
testcase_53 AC 69 ms
51,308 KB
testcase_54 AC 68 ms
51,120 KB
testcase_55 AC 69 ms
50,508 KB
testcase_56 AC 70 ms
50,532 KB
testcase_57 AC 70 ms
51,064 KB
testcase_58 AC 65 ms
51,112 KB
testcase_59 AC 68 ms
50,532 KB
testcase_60 AC 72 ms
50,576 KB
testcase_61 AC 79 ms
50,868 KB
testcase_62 AC 71 ms
51,048 KB
testcase_63 AC 73 ms
50,852 KB
testcase_64 AC 70 ms
50,684 KB
testcase_65 AC 82 ms
50,888 KB
testcase_66 AC 80 ms
50,480 KB
testcase_67 AC 70 ms
50,948 KB
testcase_68 AC 69 ms
51,112 KB
testcase_69 AC 69 ms
50,780 KB
testcase_70 AC 72 ms
51,124 KB
testcase_71 AC 70 ms
50,848 KB
testcase_72 AC 79 ms
50,920 KB
testcase_73 AC 69 ms
51,108 KB
testcase_74 AC 66 ms
51,204 KB
testcase_75 AC 70 ms
51,256 KB
testcase_76 AC 70 ms
51,036 KB
testcase_77 AC 70 ms
51,132 KB
testcase_78 AC 78 ms
50,996 KB
testcase_79 AC 70 ms
50,940 KB
testcase_80 AC 70 ms
51,040 KB
testcase_81 AC 76 ms
50,928 KB
testcase_82 AC 68 ms
50,536 KB
testcase_83 AC 68 ms
51,192 KB
testcase_84 AC 71 ms
50,772 KB
testcase_85 AC 65 ms
50,164 KB
testcase_86 AC 80 ms
50,472 KB
testcase_87 AC 72 ms
51,072 KB
testcase_88 AC 65 ms
50,548 KB
testcase_89 AC 68 ms
50,540 KB
testcase_90 AC 70 ms
51,132 KB
testcase_91 AC 78 ms
50,648 KB
testcase_92 AC 81 ms
50,968 KB
testcase_93 AC 72 ms
51,044 KB
testcase_94 AC 78 ms
50,620 KB
testcase_95 AC 80 ms
50,468 KB
testcase_96 AC 68 ms
50,852 KB
testcase_97 AC 74 ms
50,708 KB
testcase_98 AC 69 ms
50,680 KB
testcase_99 AC 73 ms
51,004 KB
testcase_100 AC 72 ms
51,052 KB
testcase_101 AC 66 ms
50,600 KB
testcase_102 AC 72 ms
50,724 KB
testcase_103 AC 61 ms
50,820 KB
testcase_104 AC 62 ms
51,032 KB
testcase_105 AC 65 ms
50,876 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 contest170310;
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 B {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		long n = nl();
		int ct = 0;
		for(int d = 1;d <= 9;d++){
			int inf = (int)Math.pow(10, (d-1)/2);
			int sup = (int)Math.pow(10, (d-1)/2+1);
			for(int i = inf;i < sup;i++){
				long b = i;
				for(int j = d % 2 == 1 ? i/10 : i;j > 0;j /= 10){
					b = b * 10 + j % 10;
				}
				b = b * 1000000001;
				if(b <= n)ct++;
			}
		}
		out.println(ct);
	}
	
	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");
//		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();
	}
	
	public static void main(String[] args) throws Exception { new B().run(); }
	
	private 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 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 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 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[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	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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