题解 | #DNA序列#
DNA序列
https://www.nowcoder.com/practice/e8480ed7501640709354db1cc4ffd42a
while 1:
try:
ss=input()
n=int(input())
mm=0
ans=ss[:n]
for i in range(len(ss)-n+1):
s=ss[i:i+n]
m=s.count("C")+s.count("G")
if m>mm:
mm=m
ans=s
print(ans)
except:
break
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