結果
問題 | No.253 ロウソクの長さ |
ユーザー |
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提出日時 | 2016-06-09 01:20:06 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 104 ms / 2,000 ms |
コード長 | 3,737 bytes |
コンパイル時間 | 2,647 ms |
コンパイル使用メモリ | 80,068 KB |
実行使用メモリ | 67,928 KB |
平均クエリ数 | 34.19 |
最終ジャッジ日時 | 2024-07-16 23:56:37 |
合計ジャッジ時間 | 7,616 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
other | AC * 36 |
ソースコード
import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.util.NoSuchElementException;public class Main {static FastScanner scan = new FastScanner();static PrintWriter out = new PrintWriter(System.out);public static void main(String[] args) {int res = ask(100);if(res == 0) {System.out.println("! 100");return;} else if(res < 0) {for(int i=2; i<=100; i++) {res = ask(0);if(res == 0) {System.out.println("! " + (i-1));return;}}}int l = 100;int r = 1000000000;int m = 0;int count = 1;while(l < r) {m = (l+r)/2;res = ask(m-count);count++;if(res == 0) {System.out.println("! " + m);return;} else if(res > 0) {l = m+1;} else {r = m;}}System.out.println("! " + l);}static int ask(int y) {out.println("? " + y);out.flush();int res = scan.nextInt();return res;}static 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;}private void skipUnprintable() {while (hasNextByte() && !isPrintableChar(buffer[ptr]))ptr++;}public boolean hasNext() {skipUnprintable();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 int nextInt() {return (int) nextLong();}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();}}}}