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  1. import math
  2.  
  3. def giaithua(x):
  4. a = 1
  5. for i in range(1, x + 1):
  6. a = a * i
  7. return a
  8.  
  9. n = int(input())
  10. print(giaithua(n))
Success #stdin #stdout 0.03s 9724KB
stdin
6
stdout
720