Created
May 12, 2017 15:27
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Caesar's Cipher (v.1)
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#!/bin/python | |
import sys | |
n = int(raw_input().strip()) | |
s = raw_input().strip() | |
k = int(raw_input().strip()) | |
def shift_n_letters(letter, n): | |
shift_amount = n % 26 | |
raw_ord = ord(letter) + shift_amount | |
# ...for no loop-arounds, straightforward cases | |
if ((ord(letter) >= ord('A') and ord(letter) <= ord('Z')) and (raw_ord >= ord('A') and raw_ord <= ord('Z'))) or ((ord(letter) >= ord('a') and ord(letter) <= ord('z')) and (raw_ord >= ord('a') and raw_ord <= ord('z'))): | |
return chr(raw_ord) | |
# Lower-case extended shift | |
elif (ord(letter) >= ord('a') and ord(letter) <= ord('z')): | |
loop_amt = shift_amount - (ord('z') - ord(letter)) | |
return chr(ord('a') + loop_amt - 1) | |
# Upper-case extended shift | |
elif (ord(letter) >= ord('A') and ord(letter) <= ord('Z')): | |
loop_amt = shift_amount - (ord('Z') - ord(letter)) | |
return chr(ord('A') + loop_amt - 1) | |
def rotate(text, n): | |
output = '' | |
for letter in text: | |
if ord(letter) in list(range(ord('a'), ord('z') + 1)) or ord(letter) in list(range(ord('A'), ord('Z') + 1)): | |
output += shift_n_letters(letter, n) | |
else: | |
output += letter | |
return output | |
print rotate(s, k) |
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Note: HackerRank 30 Days of Code: Day 4