Project Euler 59

Äntligen lite kryptoknäckning!

ciphertext = open( "cipher1.txt", "r" ).readline().split(',')

frequencies = [[0]*255,[0]*255,[0]*255] 

for char in range(0,len(ciphertext)):

   frequencies[char%3][int(ciphertext[char])] += 1

print sum(int(ciphertext[char]) ^ 32 ^ frequencies[char%3].index(max(frequencies[char%3])) for char in range(0, len(ciphertext)))