leetcode165

class Solution:
    def compareVersion(self, version1: str, version2: str) -> int:
        ary1 = version1.split('.')
        ary2 = version2.split('.')
        n1,n2 = len(ary1),len(ary2)
        i,j = 0,0
        while i < n1 and j < n2:
            v1 = int(ary1[i])
            v2 = int(ary2[j])
            if v1 < v2:
                return -1
            elif v1 > v2:
                return 1
            i += 1
            j += 1
        while i < n1:
            v1 = int(ary1[i])
            if v1 > 0:
                return 1
            i += 1
        while j < n2:
            v2 = int(ary2[j])
            if v2 > 0:
                return -1
            j += 1
        return 0