結果

問題 No.910 素数部分列
ユーザー hiromi_ayasehiromi_ayase
提出日時 2019-10-18 23:23:30
言語 Java21
(openjdk 21)
結果
AC  
実行時間 167 ms / 1,000 ms
コード長 2,872 bytes
コンパイル時間 3,160 ms
コンパイル使用メモリ 89,732 KB
実行使用メモリ 42,048 KB
最終ジャッジ日時 2024-06-25 21:56:01
合計ジャッジ時間 11,267 ms
ジャッジサーバーID
(参考情報)
judge2 / judge5
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 80 ms
38,220 KB
testcase_01 AC 80 ms
38,480 KB
testcase_02 AC 81 ms
38,496 KB
testcase_03 AC 79 ms
38,300 KB
testcase_04 AC 80 ms
38,308 KB
testcase_05 AC 80 ms
38,308 KB
testcase_06 AC 79 ms
38,076 KB
testcase_07 AC 79 ms
37,944 KB
testcase_08 AC 78 ms
37,944 KB
testcase_09 AC 80 ms
38,496 KB
testcase_10 AC 81 ms
38,216 KB
testcase_11 AC 79 ms
37,944 KB
testcase_12 AC 80 ms
38,484 KB
testcase_13 AC 81 ms
37,944 KB
testcase_14 AC 82 ms
38,536 KB
testcase_15 AC 81 ms
38,496 KB
testcase_16 AC 80 ms
38,496 KB
testcase_17 AC 82 ms
38,388 KB
testcase_18 AC 83 ms
38,076 KB
testcase_19 AC 82 ms
38,076 KB
testcase_20 AC 81 ms
38,220 KB
testcase_21 AC 81 ms
38,260 KB
testcase_22 AC 80 ms
38,112 KB
testcase_23 AC 157 ms
41,844 KB
testcase_24 AC 167 ms
41,992 KB
testcase_25 AC 158 ms
41,460 KB
testcase_26 AC 160 ms
41,596 KB
testcase_27 AC 158 ms
41,596 KB
testcase_28 AC 161 ms
41,936 KB
testcase_29 AC 161 ms
41,876 KB
testcase_30 AC 162 ms
41,484 KB
testcase_31 AC 160 ms
41,684 KB
testcase_32 AC 163 ms
41,888 KB
testcase_33 AC 161 ms
40,908 KB
testcase_34 AC 162 ms
41,632 KB
testcase_35 AC 164 ms
41,404 KB
testcase_36 AC 161 ms
41,772 KB
testcase_37 AC 163 ms
40,792 KB
testcase_38 AC 157 ms
41,828 KB
testcase_39 AC 160 ms
41,516 KB
testcase_40 AC 156 ms
41,584 KB
testcase_41 AC 157 ms
41,800 KB
testcase_42 AC 158 ms
41,628 KB
testcase_43 AC 162 ms
41,896 KB
testcase_44 AC 157 ms
41,860 KB
testcase_45 AC 159 ms
41,720 KB
testcase_46 AC 158 ms
42,040 KB
testcase_47 AC 158 ms
41,436 KB
testcase_48 AC 159 ms
40,536 KB
testcase_49 AC 156 ms
40,652 KB
testcase_50 AC 159 ms
41,352 KB
testcase_51 AC 154 ms
40,824 KB
testcase_52 AC 164 ms
42,048 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();
    char[] s = ns();

    int ret = 0;
    int nine = 0;
    int one = 0;
    for (char c : s) {
      int d = c - '0';

      if (d == 3 || d == 5 || d == 7) {
        ret++;
      } else if (d == 1) {
        one++;
      } else {
        nine++;
        if (one >= 1) {
          nine--;
          one--;
          ret++;
        }
      }
    }
    int x = Math.min(one, nine / 2);
    ret += x;
    ret += (one - x) / 2;
    System.out.println(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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