結果
問題 | No.254 文字列の構成 |
ユーザー |
|
提出日時 | 2018-08-26 14:21:34 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 323 ms / 5,000 ms |
コード長 | 2,805 bytes |
コンパイル時間 | 2,577 ms |
コンパイル使用メモリ | 84,456 KB |
実行使用メモリ | 48,460 KB |
最終ジャッジ日時 | 2024-07-01 03:55:53 |
合計ジャッジ時間 | 9,318 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 30 |
ソースコード
import java.io.IOException;import java.io.InputStream;import java.util.Arrays;import java.util.Comparator;import java.util.NoSuchElementException;public class Main {public static void main(String[] args) {new Main().run();}void run() {Scanner sc = new Scanner();long N = sc.nextLong();String ans = "";long[] comb = new long[100000];for (long i = 0; i < comb.length; ++i) {// aがi+1個,bがi個の時、comb[(int) i] = (i + 2) * (i + 1) / 2 + (i + 1) * i / 2;}for (int i = 0; i < 27 && N > 0; ++i) {int j = 0;while (comb[j + 1] <= N) {++j;}String a = String.valueOf((char) ('a' + 2 * i));String b = String.valueOf((char) ('a' + 2 * i + 1));String add = "";for (int k = 0; k < j; ++k) {add = add + b + a;}add = add + b;ans = ans + add;N -= comb[j];}if (N != 0)throw new AssertionError();System.out.println(ans);}void tr(Object... objects) {System.out.println(Arrays.deepToString(objects));}class Scanner {private final InputStream in = System.in;private final byte[] buffer = new byte[1024];private int ptr = 0;private int buflen = 0;private boolean hasNextByte() {if (ptr < buflen) {return true;} else {ptr = 0;try {buflen = in.read(buffer);} catch (IOException e) {e.printStackTrace();}if (buflen <= 0) {return false;}}return true;}private int readByte() {if (hasNextByte())return buffer[ptr++];elsereturn -1;}private boolean isPrintableChar(int c) {return 33 <= c && c <= 126;}public boolean hasNext() {while (hasNextByte() && !isPrintableChar(buffer[ptr]))ptr++;return hasNextByte();}public String next() {if (!hasNext())throw new NoSuchElementException();StringBuilder sb = new StringBuilder();int b = readByte();while (isPrintableChar(b)) {sb.appendCodePoint(b);b = readByte();}return sb.toString();}public long nextLong() {if (!hasNext())throw new NoSuchElementException();long n = 0;boolean minus = false;int b = readByte();if (b == '-') {minus = true;b = readByte();}if (b < '0' || '9' < b) {throw new NumberFormatException();}while (true) {if ('0' <= b && b <= '9') {n *= 10;n += b - '0';} else if (b == -1 || !isPrintableChar(b)) {return minus ? -n : n;} else {throw new NumberFormatException();}b = readByte();}}public int nextInt() {long nl = nextLong();if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)throw new NumberFormatException();return (int) nl;}public double nextDouble() {return Double.parseDouble(next());}}}