Minsu Kim/python/Rosalind / problem10
From Biolecture.org
f = open('rosalind_ba1l.txt','r')
seq = f.readline().strip()
f.close
a = 0
for i in range(0, len(seq)):
if seq[i] == 'A':
d = 0
if seq[i] == 'C':
d = 1
if seq[i] == 'G':
d = 2
if seq[i] == 'T':
d = 3
d = d*(4**(len(seq)-i-1))
a += d
print(a)
