i wrote a code and it works correctly but the mentor gave me 0!!!! look at this problem:

"""Write a program that reads some positive numbers from the input and prints its square root up to 4 decimal places."""

from math import sqrt
n=int(input())
L=[]
for i in range(n):
    a=int(input())
    L.append(sqrt(a))
for i in L:
     print('%.4f' % i)

is that correct?

i wanna find my mistake and solve that.