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ljxpython
test_engineer
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"""
给你两个 版本号字符串 version1 和 version2 ,请你比较它们。版本号由被点 '.' 分开的修订号组成。修订号的值 是它 转换为整数 并忽略前导零。
比较版本号时,请按 从左到右的顺序 依次比较它们的修订号。如果其中一个版本字符串的修订号较少,则将缺失的修订号视为 0。
返回规则如下:
如果 version1 < version2 返回 -1,
如果 version1 > version2 返回 1,
除此之外返回 0。
示例 1:
输入:version1 = "1.2", version2 = "1.10"
输出:-1
解释:
version1 的第二个修订号为 "2",version2 的第二个修订号为 "10":2 < 10,所以 version1 < version2。
示例 2:
输入:version1 = "1.01", version2 = "1.001"
输出:0
解释:
忽略前导零,"01" 和 "001" 都代表相同的整数 "1"。
示例 3:
输入:version1 = "1.0", version2 = "1.0.0.0"
输出:0
解释:
version1 有更少的修订号,每个缺失的修订号按 "0" 处理。
题解:
感觉这道题要完成这几个步骤:
1. 先将版本号字符串按照点号分割成修订号列表
2. 遍历两个列表,比较每个修订号的大小
3. 根据比较结果返回相应的整数
感觉这里还要姐姐,如果没有s[x]时的场景,及两个列表比大小
"""
class Solution(object):
def compareVersion(self, version1, version2):
"""
:type version1: str
:type version2: str
:rtype: int
"""
version1_list = version1.split('.')
version2_list = version2.split('.')
max_length = max(len(version1_list),len(version2_list))
for i in range(max_length):
v1 = int(version1_list[i]) if i < len(version1_list) else 0
v2 = int(version2_list[i]) if i < len(version2_list) else 0
if v1 > v2:
return 1
elif v1 < v2:
return -1
return 0
if __name__ == '__main__':
s = '001'
print(int(s))
print(s[3])
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