Answer to Question #296889 in Python for Ram

Question

New Dictionary

Peter is making a new dictionary.He wants to arrange the words in the ascending order of their length and later arrange the ones with the same length in lexicographic order.Each word is given a serial number according to its position.Find the word according to the serial number.

Input

The first line of input is a positive integer which is the serial number.

Word Serial Number

A 1

B 2

C 3

... ...

X 24

Y 25

Z 26

AA 27

AB 28

... ...

BA 53

... ...

ZZ 702

AAA 703

Explanation

Given serial number is 42.

As the serial number is between 26 and 52, the first character of the word is A.The remaining counter of the serial number is 16 (42-26).

The second character of the word is the 16th alphabet, which is P.

So, the output should be AP.

Sample Input1

42

Sample Output1

AP

Sample input2

751

Sample output2

ABW

Answer 1

letters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
n = int(input())
length = 1
while (n - 1) // 26 ** length:
    n -= 26 ** length
    length += 1
rez = ''
for i in range(length):
    ind = (n - 1) // 26 ** (length - i - 1)
    rez += letters[ind]
    n -= 26 ** (length - i - 1) * ind

print(rez)