結果

問題 No.600 かい文回
ユーザー tanzakutanzaku
提出日時 2017-11-24 23:38:36
言語 Java11
(openjdk 11.0.7)
結果
AC  
実行時間 222 ms / 2,000 ms
コード長 4,277 Byte
コンパイル時間 2,270 ms
使用メモリ 26,400 KB
最終ジャッジ日時 2020-06-04 03:31:54

テストケース

テストケース表示
入力 結果 実行時間
使用メモリ
testcase_00 AC 171 ms
25,172 KB
testcase_01 AC 174 ms
25,028 KB
testcase_02 AC 211 ms
26,388 KB
testcase_03 AC 204 ms
26,320 KB
testcase_04 AC 179 ms
25,508 KB
testcase_05 AC 212 ms
26,400 KB
testcase_06 AC 209 ms
26,388 KB
testcase_07 AC 222 ms
26,320 KB
testcase_08 AC 208 ms
26,300 KB
testcase_09 AC 222 ms
26,396 KB
testcase_10 AC 213 ms
26,324 KB
testcase_11 AC 216 ms
26,308 KB
testcase_12 AC 218 ms
26,344 KB
testcase_13 AC 205 ms
26,320 KB
testcase_14 AC 207 ms
26,308 KB
testcase_15 AC 77 ms
21,044 KB
testcase_16 AC 207 ms
26,324 KB
testcase_17 AC 201 ms
26,052 KB
testcase_18 AC 177 ms
25,444 KB
testcase_19 AC 193 ms
25,532 KB
testcase_20 AC 205 ms
25,956 KB
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ソースコード

diff #
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.Reader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        MyInput in = new MyInput(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskD solver = new TaskD();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskD {
        public void solve(int testNumber, MyInput in, PrintWriter out) {
            int n = in.nextInt();
            if (n == 1) {
                out.println("a");
                return;
            }

            String ans = rec(n, 'a');
            StringBuilder sb = new StringBuilder(ans);
            sb.reverse();
            out.println(ans + sb.toString());
        }

        String rec(int idx, char c) {
            if (c > 'z') c = 'a';
            if (idx == 2) {
                return c + "";
            }
            if (idx == 3) {
                return c + "" + (char) (c + 1);
            }
            if (idx % 2 == 1) {
                String s = rec(idx / 2, (char) (c + 1));
                return c + "" + s.charAt(0) + s;
            } else {
                String s = rec(idx / 2, c);
                return s.charAt(0) + s;
            }
        }

    }

    static class MyInput {
        private final BufferedReader in;
        private static int pos;
        private static int readLen;
        private static final char[] buffer = new char[1024 * 8];
        private static char[] str = new char[500 * 8 * 2];
        private static boolean[] isDigit = new boolean[256];
        private static boolean[] isSpace = new boolean[256];
        private static boolean[] isLineSep = new boolean[256];

        static {
            for (int i = 0; i < 10; i++) {
                isDigit['0' + i] = true;
            }
            isDigit['-'] = true;
            isSpace[' '] = isSpace['\r'] = isSpace['\n'] = isSpace['\t'] = true;
            isLineSep['\r'] = isLineSep['\n'] = true;
        }

        public MyInput(InputStream is) {
            in = new BufferedReader(new InputStreamReader(is));
        }

        public int read() {
            if (pos >= readLen) {
                pos = 0;
                try {
                    readLen = in.read(buffer);
                } catch (IOException e) {
                    throw new RuntimeException();
                }
                if (readLen <= 0) {
                    throw new MyInput.EndOfFileRuntimeException();
                }
            }
            return buffer[pos++];
        }

        public int nextInt() {
            int len = 0;
            str[len++] = nextChar();
            len = reads(len, isSpace);
            int i = 0;
            int ret = 0;
            if (str[0] == '-') {
                i = 1;
            }
            for (; i < len; i++) ret = ret * 10 + str[i] - '0';
            if (str[0] == '-') {
                ret = -ret;
            }
            return ret;
        }

        public char nextChar() {
            while (true) {
                final int c = read();
                if (!isSpace[c]) {
                    return (char) c;
                }
            }
        }

        int reads(int len, boolean[] accept) {
            try {
                while (true) {
                    final int c = read();
                    if (accept[c]) {
                        break;
                    }
                    if (str.length == len) {
                        char[] rep = new char[str.length * 3 / 2];
                        System.arraycopy(str, 0, rep, 0, str.length);
                        str = rep;
                    }
                    str[len++] = (char) c;
                }
            } catch (MyInput.EndOfFileRuntimeException e) {
            }
            return len;
        }

        static class EndOfFileRuntimeException extends RuntimeException {
        }

    }
}

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