n=10000
count=n-1
result="2"
for i in range(0, count):
num=result
result=""
k1=0#前進位1
k2=0#當前進位
for j in range(0,len(num)):
if((int(num[j])*2+k2)>=10):
k1=1#進位1
result=result+str((int(num[j])*2+k2)%10)
k2=k1
k1=0
if k2==1:
result=result+str(k2)
if count==0:
result="1"
result=result[::-1]
print(result)
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