結果
問題 |
No.180 美しいWhitespace (2)
|
ユーザー |
|
提出日時 | 2016-07-04 19:27:16 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 92 ms / 5,000 ms |
コード長 | 2,014 bytes |
コンパイル時間 | 4,485 ms |
コンパイル使用メモリ | 79,368 KB |
実行使用メモリ | 38,704 KB |
最終ジャッジ日時 | 2024-10-12 20:11:07 |
合計ジャッジ時間 | 8,237 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 31 |
ソースコード
import java.io.*; import java.util.*; public class Main_yukicoder180 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); Printer pr = new Printer(System.out); int n = sc.nextInt(); int[] a = new int[n]; int[] b = new int[n]; for (int i = 0; i < n; i++) { a[i] = sc.nextInt(); b[i] = sc.nextInt(); } // 整数の三分探索 long l = 0; long r = 1_000_000_000; while (r - l > 1) { long mid = l + (r - l) / 2; if (f(mid + 1, a, b) - f(mid, a, b) >= 0) { r = mid; } else { l = mid; } } pr.println(r); pr.close(); sc.close(); } private static long f(long x, int[] a, int[] b) { long min = Long.MAX_VALUE; long max = Long.MIN_VALUE; for (int i = 0; i < a.length; i++) { min = Math.min(min, (long)a[i] + b[i] * x); max = Math.max(max, (long)a[i] + b[i] * x); } return max - min; } @SuppressWarnings("unused") private static class Scanner { BufferedReader br; Iterator<String> it; Scanner (InputStream in) { br = new BufferedReader(new InputStreamReader(in)); } String next() throws RuntimeException { try { if (it == null || !it.hasNext()) { it = Arrays.asList(br.readLine().split(" ")).iterator(); } return it.next(); } catch (IOException e) { throw new IllegalStateException(); } } int nextInt() throws RuntimeException { return Integer.parseInt(next()); } long nextLong() throws RuntimeException { return Long.parseLong(next()); } float nextFloat() throws RuntimeException { return Float.parseFloat(next()); } double nextDouble() throws RuntimeException { return Double.parseDouble(next()); } void close() { try { br.close(); } catch (IOException e) { // throw new IllegalStateException(); } } } private static class Printer extends PrintWriter { Printer(PrintStream out) { super(out); } } }