結果

問題 No.2235 Line Up Colored Balls
ユーザー hiromi_ayasehiromi_ayase
提出日時 2023-03-03 22:41:25
言語 Java21
(openjdk 21)
結果
AC  
実行時間 359 ms / 2,000 ms
コード長 3,171 bytes
コンパイル時間 5,875 ms
コンパイル使用メモリ 82,884 KB
実行使用メモリ 62,016 KB
最終ジャッジ日時 2023-10-18 04:29:18
合計ジャッジ時間 19,519 ms
ジャッジサーバーID
(参考情報)
judge15 / judge13
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 86 ms
54,936 KB
testcase_01 AC 88 ms
54,872 KB
testcase_02 AC 87 ms
54,868 KB
testcase_03 AC 86 ms
54,876 KB
testcase_04 AC 312 ms
61,904 KB
testcase_05 AC 91 ms
54,864 KB
testcase_06 AC 89 ms
54,892 KB
testcase_07 AC 290 ms
60,176 KB
testcase_08 AC 88 ms
54,872 KB
testcase_09 AC 89 ms
54,872 KB
testcase_10 AC 90 ms
54,872 KB
testcase_11 AC 87 ms
54,880 KB
testcase_12 AC 88 ms
54,876 KB
testcase_13 AC 86 ms
54,892 KB
testcase_14 AC 89 ms
54,924 KB
testcase_15 AC 87 ms
54,896 KB
testcase_16 AC 90 ms
54,924 KB
testcase_17 AC 90 ms
54,884 KB
testcase_18 AC 320 ms
61,600 KB
testcase_19 AC 311 ms
61,996 KB
testcase_20 AC 321 ms
61,980 KB
testcase_21 AC 320 ms
61,664 KB
testcase_22 AC 329 ms
61,988 KB
testcase_23 AC 326 ms
61,988 KB
testcase_24 AC 325 ms
61,604 KB
testcase_25 AC 317 ms
61,996 KB
testcase_26 AC 330 ms
62,008 KB
testcase_27 AC 331 ms
62,016 KB
testcase_28 AC 312 ms
60,096 KB
testcase_29 AC 317 ms
60,384 KB
testcase_30 AC 309 ms
60,264 KB
testcase_31 AC 304 ms
60,076 KB
testcase_32 AC 318 ms
60,148 KB
testcase_33 AC 298 ms
59,968 KB
testcase_34 AC 312 ms
59,964 KB
testcase_35 AC 325 ms
60,360 KB
testcase_36 AC 290 ms
60,148 KB
testcase_37 AC 316 ms
60,288 KB
testcase_38 AC 153 ms
56,124 KB
testcase_39 AC 105 ms
53,660 KB
testcase_40 AC 171 ms
57,372 KB
testcase_41 AC 322 ms
60,264 KB
testcase_42 AC 319 ms
60,244 KB
testcase_43 AC 126 ms
56,040 KB
testcase_44 AC 264 ms
60,068 KB
testcase_45 AC 135 ms
55,960 KB
testcase_46 AC 359 ms
60,244 KB
testcase_47 AC 260 ms
60,132 KB
testcase_48 AC 323 ms
61,988 KB
testcase_49 AC 326 ms
61,992 KB
testcase_50 AC 326 ms
62,000 KB
testcase_51 AC 328 ms
61,988 KB
testcase_52 AC 328 ms
61,980 KB
testcase_53 AC 315 ms
61,904 KB
testcase_54 AC 333 ms
61,988 KB
testcase_55 AC 334 ms
61,984 KB
testcase_56 AC 320 ms
61,996 KB
testcase_57 AC 327 ms
61,532 KB
testcase_58 AC 89 ms
54,988 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 #

import java.util.*;

@SuppressWarnings("unused")
public class Main {

  private static void solve() {
    int n = ni();
    long[] x = nal(n);
    int mod = (int) 1e9 + 7;

    long sum = Arrays.stream(x).sum();

    long p = 0;
    for (int i = 0; i < n; i++) {
      p += x[i] * inv(sum, mod) % mod * (x[i] - 1) % mod * inv(sum - 1, mod) % mod;
      p %= mod;
    }
    p = (1 + mod - p) % mod;
    p = p * (sum - 1) % mod + 1;
    p %= mod;


    System.out.println(p);

    // ab 1/3 * 1
    // aa 1/3 * 0
    // ba 1/3 * 1

    // 2/3 * 2 + 17/3
  }

  public static long inv(long a, long mod) {
    long b = mod;
    long p = 1, q = 0;
    while (b > 0) {
      long c = a / b;
      long d;
      d = a;
      a = b;
      b = d % b;
      d = p;
      p = q;
      q = d - c * q;
    }
    return p < 0 ? p + mod : p;
  }

  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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