题解 | #DNA序列#
DNA序列
https://www.nowcoder.com/practice/e8480ed7501640709354db1cc4ffd42a
def GC_Ratio(s):
G_n = s.count('G')
C_n = s.count('C')
Ratio = (G_n+C_n)/Length
s_L.append(s)
Ration_L.append(Ratio)
DNA = input()
Length = int(input())
s_L = []
Ration_L = []
for i in range(len(DNA)-Length+1):
GC_Ratio(DNA[i:i+Length])
print(s_L[Ration_L.index(max(Ration_L))])
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