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  1. s,a=801**.5-28,[0,0==0]
  2. for i in range(int(input())):a+=[a[i]+a[-1]*int(1/s)];s=1/s-1//s
  3. (print(a[-2]),) #.0fhlmop|
Success #stdin #stdout 0.02s 9992KB
stdin
9
stdout
7667