No.327 Alphabet Sequence
レベル :
/ AI推定難易度 : 650
/ 実行時間制限 : 1ケース 2.000秒 / メモリ制限
: 512 MB / 標準ジャッジ問題
タグ : / 解いたユーザー数 361
作問者 :
yuki2006
タグ : / 解いたユーザー数 361
作問者 :
yuki2006
問題文最終更新日: 2022-12-08 21:39:33
English (AI translation)
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Advent Calendar Contest 2015
(順位表)
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Problem Statement
We want to convert a number $N$, starting from 0, into its corresponding alphabet string.
An alphabet string represents a number using the $26$ uppercase letters.
Specifically, the order is as follows. (Each comma-separated item is one alphabet string.)
$A,B,C,\dots,Z,AA,AB,\dots,AZ,BA,BB,\dots,ZZ,AAA,\dots,ZZZ,AAAA,\dots$
Given an integer $N$, find the $N$-th alphabet string.
Input
N
$N$ is an integer.
$0 \le N \le 1000000000000=10^{12}$
Output
Print the corresponding uppercase alphabet string.
Print a newline at the end.
Sample
Sample 1
Input
0
Output
A
0 corresponds to "A".
Sample 2
Input
25
Output
Z
Sample 3
Input
26
Output
AA
"AA" comes after "Z".
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