P9230 [蓝桥杯 2023 省 A] 填空问题

这个我和网上的题解算的都不一样，有哪个好心人可以告诉我哪里有问题？ 非常感谢

# 幸运数
n = 0
for num in range(1,100000000):
    numstr = str(num)
    length = len(numstr)
    fnum = 0
    lnum = 0
    if length%2 == 0:
        g = int(numstr[-1])
        if(g%2==0):
            fronter = numstr[:int(length / 2)]
            later = numstr[int(length / 2):]
            for x in fronter:
                fnum += int(x)
            for x in later:
                lnum += int(x)
            if fnum == lnum:
                n = n + 1
print(n)
# 答案：2207030