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  1. def initial_reading(n):
  2. list1=[]
  3. for x in range(1,n+1):
  4. list1.append(x)
  5. initial=''.join([str(i) for i in list1])
  6. return initial
  7. a = int(input())
  8. print(initial_reading(a))
Success #stdin #stdout 0.02s 9352KB
stdin
4
stdout
1234