結果
問題 | No.491 10^9+1と回文 |
ユーザー |
![]() |
提出日時 | 2020-10-04 13:54:31 |
言語 | Java (openjdk 23) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,859 bytes |
コンパイル時間 | 2,909 ms |
コンパイル使用メモリ | 79,232 KB |
実行使用メモリ | 43,188 KB |
最終ジャッジ日時 | 2024-07-19 11:07:03 |
合計ジャッジ時間 | 27,359 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 56 WA * 47 |
ソースコード
import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import java.util.NoSuchElementException;import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);//FastScanner scanner=new FastScanner();PrintWriter out = new PrintWriter(System.out);int ans=0;long n=scanner.nextLong();for(long i=1; i<=9; i++) {if(i*1000000001<=n) ans++;}for(int i=1; i<=9999; i++) {if(i%10==0) continue;List<Integer> d=new ArrayList<Integer>();int x=i;while(x>0) {d.add(x%10);x/=10;}int a=i, p=1;for(int j=0; j<d.size(); j++) p*=10;for(int j=0; j<d.size(); j++) {a+=p*d.get(d.size()-1-j);p*=10;}if((long)a*1000000001<=n) ans++;for(int j=0; j<10; j++) {a=i; p=1;for(int k=0; k<d.size(); k++) p*=10;a+=p*j;p*=10;for(int k=0; k<d.size(); k++) {a+=p*d.get(d.size()-1-k);p*=10;}if((long)a*1000000001<=n) ans++;}}out.println(ans);out.close();scanner.close();}}class FastScanner {private final InputStream in = System.in;private final byte[] buffer = new byte[1024];private int ptr = 0;private int buflen = 0;private boolean hasNextByte() {if (ptr < buflen) {return true;} else {ptr = 0;try {buflen = in.read(buffer);} catch (IOException e) {e.printStackTrace();}if (buflen <= 0) {return false;}}return true;}private int readByte() {if (hasNextByte())return buffer[ptr++];elsereturn -1;}private static boolean isPrintableChar(int c) {return 33 <= c && c <= 126;}public boolean hasNext() {while (hasNextByte() && !isPrintableChar(buffer[ptr]))ptr++;return hasNextByte();}public String next() {if (!hasNext())throw new NoSuchElementException();StringBuilder sb = new StringBuilder();int b = readByte();while (isPrintableChar(b)) {sb.appendCodePoint(b);b = readByte();}return sb.toString();}public long nextLong() {if (!hasNext())throw new NoSuchElementException();long n = 0;boolean minus = false;int b = readByte();if (b == '-') {minus = true;b = readByte();}if (b < '0' || '9' < b) {throw new NumberFormatException();}while (true) {if ('0' <= b && b <= '9') {n *= 10;n += b - '0';} else if (b == -1 || !isPrintableChar(b)) {return minus ? -n : n;} else {throw new NumberFormatException();}b = readByte();}}public int nextInt() {long nl = nextLong();if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)throw new NumberFormatException();return (int) nl;}public double nextDouble() {return Double.parseDouble(next());}}