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Discussion of Problem
1225
. Flags
why WA in 5
Posted by
Bazeev Damir`~
11 Feb 2018 09:57
import math
n=int(input())
ans=2
shag1=2
shag2=0
for i in range(n):
c=ans-shag1-shag2
ans+=c
shag2=shag1
shag1=c
print(ans)
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