Time efficiency error


#1

why am i getting this error that the solution is not time efficient:
def solve(A):
count = 0

    for i in range(len(A)):
        sum1 = 0
        sum2 = 0
        B = A.copy()
        B.pop(i)
        for j in B[::2]:
            sum1 += j
        for k in B[1::2]:
            sum2 += k
        if sum1 == sum2:
            count += 1
    return count