結果

問題 No.1251 絶対に間違ってはいけない最小化問題
ユーザー hiromi_ayase
提出日時 2020-10-09 22:13:47
言語 Java
(openjdk 23)
結果
AC  
実行時間 830 ms / 2,000 ms
コード長 3,346 bytes
コンパイル時間 4,727 ms
コンパイル使用メモリ 90,700 KB
実行使用メモリ 75,552 KB
最終ジャッジ日時 2024-07-20 12:07:39
合計ジャッジ時間 33,266 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 42
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 #

import java.util.*;

@SuppressWarnings("unused")
public class Main {

  private static void solve() {
    int n = ni();
    long[][] p = new long[n][2];
    long bsum = 0;
    for (int i = 0; i < n; i++) {
      p[i][0] = nl();
    }
    for (int i = 0; i < n; i++) {
      p[i][1] = nl();
      bsum += p[i][1];
    }

    if (n == 1) {
      System.out.println(p[0][0] + " " + f(p, p[0][0]));
      return;
    }
    Arrays.sort(p, (o1, o2) -> Long.compare(o1[0], o2[0]));

    long s = 0;
    int arg = 0;
    for (int i = 0; i < n; i++) {
      s += p[i][1];
      if (s * 2 >= bsum) {
        arg = i;
        break;
      }
    }

    if (arg > 0 && f(p, p[arg][0]) > f(p, p[arg - 1][0])) {
      System.out.println(p[arg - 1][0] + " " + f(p, p[arg - 1][0]));
    } else {
      System.out.println(p[arg][0] + " " + f(p, p[arg][0]));
    }
  }

  private static long f(long[][] p, long x) {
    long ret = 0;
    for (long[] v : p) {
      ret += v[1] * Math.abs(x - v[0]);
    }
    return ret;
  }

  public static void main(String[] args) {
    new Thread(null, new Runnable() {
      @Override
      public void run() {
        long start = System.currentTimeMillis();
        String debug = args.length > 0 ? args[0] : null;
        if (debug != null) {
          try {
            is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug));
          } catch (Exception e) {
            throw new RuntimeException(e);
          }
        }
        reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768);
        solve();
        out.flush();
        tr((System.currentTimeMillis() - start) + "ms");
      }
    }, "", 64000000).start();
  }

  private static java.io.InputStream is = System.in;
  private static java.io.PrintWriter out = new java.io.PrintWriter(System.out);
  private static java.util.StringTokenizer tokenizer = null;
  private static java.io.BufferedReader reader;

  public static String next() {
    while (tokenizer == null || !tokenizer.hasMoreTokens()) {
      try {
        tokenizer = new java.util.StringTokenizer(reader.readLine());
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
    return tokenizer.nextToken();
  }

  private static double nd() {
    return Double.parseDouble(next());
  }

  private static long nl() {
    return Long.parseLong(next());
  }

  private static int[] na(int n) {
    int[] a = new int[n];
    for (int i = 0; i < n; i++)
      a[i] = ni();
    return a;
  }

  private static char[] ns() {
    return next().toCharArray();
  }

  private static long[] nal(int n) {
    long[] a = new long[n];
    for (int i = 0; i < n; i++)
      a[i] = nl();
    return a;
  }

  private static int[][] ntable(int n, int m) {
    int[][] table = new int[n][m];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < m; j++) {
        table[i][j] = ni();
      }
    }
    return table;
  }

  private static int[][] nlist(int n, int m) {
    int[][] table = new int[m][n];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < m; j++) {
        table[j][i] = ni();
      }
    }
    return table;
  }

  private static int ni() {
    return Integer.parseInt(next());
  }

  private static void tr(Object... o) {
    if (is != System.in)
      System.out.println(java.util.Arrays.deepToString(o));
  }
}
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