[leetCode] Compare Version Numbers
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Compare two version numbers version1 and version1.
If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0.
You may assume that the version strings are non-empty and contain only digits and the .
character.
The .
character does not represent a decimal point and is used to separate number sequences.
For instance, 2.5
is not "two and a half" or "half way to version three", it is the fifth second-level revision of the second first-level revision.
Here is an example of version numbers ordering:
0.1 < 1.1 < 1.2 < 13.37
Credits:
Special thanks to @ts for adding this problem and creating all test cases.
public class Solution { public int compareVersion(String version1, String version2) { if (version1 == "" || version2 == "") return 0; String[] v1 = version1.split("\\."); String[] v2 = version2.split("\\."); if (v1.length == 0 || v2.length == 0) return 0; for (int i =0; i < v1.length && i < v2.length; i++) { int tmp1 = Integer.parseInt(v1[i]); int tmp2 = Integer.parseInt(v2[i]); if (tmp1 > tmp2) return 1; else if (tmp1 < tmp2) return -1; } if (v1.length > v2.length) { for (int i = v2.length; i < v1.length; i++) { if (Integer.parseInt(v1[i]) != 0) return 1; } } else if (v1.length < v2.length) { for (int i = v1.length; i < v2.length; i++) { if (Integer.parseInt(v2[i]) != 0) return -1; } } return 0; }}
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