题解 | #DNA序列#
DNA序列
http://www.nowcoder.com/practice/e8480ed7501640709354db1cc4ffd42a
while True:
try:
s = input()
n = int(input())
dic = {}
for i in range(len(s[0:1-n])):
dic[i] = s[i:i+n].count('G')+s[i:i+n].count('C')
dic_sort = sorted(dic.items(), key = lambda item: item[1], reverse=True)
index = dic_sort[0][0]
print(s[index:index+n])
except:
break
