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  1. n = int(input())
  2. fac_2n = 1
  3. fac_n = 1
  4. for i in range(1,2*n+1):
  5.     fac_2n = fac_2n*i
  6.  
  7.  
  8. for i in range(1,n+1):
  9.     fac_n = fac_n*i;
  10.  
  11. ans = int(fac_2n/(fac_n*fac_n*(n+1)))
  12. print(ans)
Success #stdin #stdout 0.02s 9180KB
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https://ideone.com/g39ktb
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
public

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