Why is this exceeding the time limit?

[crazyJuice]

> class Solution:
>         # @param A : list of integers
>         # @return an integer
>         def solve(self, A):
>             A.sort()
>             j=0
>             #print(A)
>             while j<len(A):
>                 if A[j]>=0:
>                     if A[j]==0 and j==len(A)-1:
>                         return 1
>                     elif A[j]==len(A[j+1:]) and A[j]!=A[j+1]:
>                         return 1
>                 j+=1
>             return -1

[abhishekwl]

A.sort() in on itself has a time complexity of O(n), that’s probably why it’s exceeding the time limit