結果

問題 No.942 プレゼント配り
ユーザー hiromi_ayasehiromi_ayase
提出日時 2019-12-05 02:02:00
言語 Java19
(openjdk 21)
結果
AC  
実行時間 271 ms / 2,000 ms
コード長 3,506 bytes
コンパイル時間 4,324 ms
コンパイル使用メモリ 82,908 KB
実行使用メモリ 59,084 KB
最終ジャッジ日時 2023-08-21 14:35:46
合計ジャッジ時間 8,993 ms
ジャッジサーバーID
(参考情報)
judge14 / judge15
このコードへのチャレンジ(β)

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 69 ms
51,264 KB
testcase_01 AC 251 ms
57,976 KB
testcase_02 AC 68 ms
50,792 KB
testcase_03 AC 68 ms
50,640 KB
testcase_04 AC 249 ms
57,472 KB
testcase_05 AC 271 ms
57,928 KB
testcase_06 AC 68 ms
50,580 KB
testcase_07 AC 83 ms
50,964 KB
testcase_08 AC 238 ms
57,736 KB
testcase_09 AC 225 ms
57,860 KB
testcase_10 AC 71 ms
50,660 KB
testcase_11 AC 70 ms
50,788 KB
testcase_12 AC 70 ms
50,784 KB
testcase_13 AC 69 ms
50,784 KB
testcase_14 AC 249 ms
57,084 KB
testcase_15 AC 213 ms
58,600 KB
testcase_16 AC 232 ms
59,084 KB
testcase_17 AC 223 ms
58,692 KB
testcase_18 AC 83 ms
52,760 KB
testcase_19 AC 68 ms
51,116 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 #

public class Main {

  private static void solve() {
    int n = ni();
    int k = ni();

    long sum = (long) n * (n + 1) / 2;

    if (n == 1 && k == 1) {
      System.out.println("Yes\n1");
      return;
    }
    if (sum % k != 0 || n == k) {
      System.out.println("No");
    } else {
      int m = n / k;
      int[][] ret = new int[k][m];
      int v = 1;
      for (int i = 0; i < m - 1; i += 2) {
        for (int j = 0; j < k; j++) {
          ret[j][i] = v++;
        }
        for (int j = k - 1; j >= 0; j--) {
          ret[j][i + 1] = v++;
        }
      }

      if (m % 2 == 1) {
        v -= k;
        for (int j = k - 1; j >= 0; j -= 2) {
          ret[j][m - 2] = v++;
        }
        for (int j = k - 2; j >= 0; j -= 2) {
          ret[j][m - 2] = v++;
        }
        for (int j = k - 2; j >= 0; j -= 2) {
          ret[j][m - 1] = v++;
        }
        for (int j = k - 1; j >= 0; j -= 2) {
          ret[j][m - 1] = v++;
        }
      }

      out.println("Yes");
      for (int i = 0; i < k; i++) {
        for (int j = 0; j < m; j++) {
          out.print(ret[i][j] + " ");
        }
        out.println();
      }
    }

  }

  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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