#65122 (Java) No.319 happy b1rthday 2 me

• 問題: No.319 happy b1rthday 2 me
• ユーザー: Grenache
• 提出日時: 2015-12-12 22:52:06
• 言語: Java (openjdk 23)
• 結果: AC
• 実行時間: 57 ms / 2,000 ms
• コード長: 3,134 bytes
• コンパイル時間: 3,675 ms
• コンパイル使用メモリ: 79,632 KB
• 実行使用メモリ: 37,280 KB
• 最終ジャッジ日時: 2024-09-15 08:50:18
• 合計ジャッジ時間: 6,398 ms
• ジャッジサーバーID （参考情報）: judge4 / judge2

ファイルパターン	結果
sample	AC * 4
other	AC * 29

ソースコード

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Iterator;
public class Main_yukicoder319 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Printer pr = new Printer(System.out);
        long a = sc.nextLong();
        long b = sc.nextLong();
        long ret = happy(b) - happy(a - 1);
        String tmp = Long.toString(a);
        if (tmp.charAt(0) == '2' && tmp.charAt(tmp.length() - 1) == '2') {
            pr.println(ret - 1);
        } else {
            pr.println(ret);
        }
//        long prev = 0;
//        for (long aa = 1; aa < 2000; aa++) {
//          long tmpt = happy(aa);
//          if (tmpt < prev) {
//              pr.println("wrong");
//          }
//          pr.printf("%d : %d\n", aa, tmpt);
//          prev = tmpt;
//        }
        pr.close();
        sc.close();
    }
    private static long happy(long a) {
        long base = 1;
        long n12 = 12;
        long ret = 0;
        while (a > base) {
            long tmp1 = a / (base * 100);
            long tmp2 = a % (base * 100);
            ret += tmp1 * base;
            long tmp3 = tmp2 - base * n12 + 1;
            tmp3 = Math.max(tmp3, 0);
            tmp3 = Math.min(tmp3, base);
            ret += tmp3;
            base *= 10;
        }
        String s = Long.toString(a);
        int n = s.length();
        if (a >= 2 && a < 22) {
            ret += 1;
        } else if (a >= 22 && a <= 111) {
                ret += 2;
        } else if (a > 111) {
            ret += 1;
            int d1 = s.charAt(n - 1) - '0';
            int d2 = s.charAt(0) - '0';
            char[] tmp = s.substring(1, n - 1).toCharArray();
            long b = 1;
            for (int i = 0; i < n - 2; i++) {
                ret += b;
                b *= 10;
            }
            if (d2 == 2) {
                long tmp1 = Long.parseLong(new String(tmp));
//                  long tmp1 = 0;
//                  long b2 = 1;
//                  for (int i = tmp.length - 1; i >= 0; i--) {
//                      tmp1 += (tmp[i] - '0' + 1) * b2;
//                      b2 *= 10;
//                  }
                ret += tmp1 + 1;
                if (d1 < 2) {
                    ret--;
                }
            } else if (d2 > 2) {
                ret += b;
            } else {
            }
        }
        return ret;
    }
    @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);
        }
    }
}
 
 
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