main.go

package _0165

import (
	"strconv"
	"strings"
)

func compareVersion(version1 string, version2 string) int {
	v1 := strings.Split(version1, ".")
	v2 := strings.Split(version2, ".")
	for i := 0; i < len(v1) || i < len(v2); i++ {
		x, y := 0, 0
		if i < len(v1) {
			x, _ = strconv.Atoi(v1[i])
		}
		if i < len(v2) {
			y, _ = strconv.Atoi(v2[i])
		}
		if x > y {
			return 1
		}
		if x < y {
			return -1
		}
	}
	return 0
}

func compareVersionSolution2(version1 string, version2 string) int {
	i, j := 0, 0
	for i < len(version1) || j < len(version2) {
		x := 0
		for ; i < len(version1) && version1[i] != '.'; i++ {
			x = x*10 + int(version1[i]-'0')
		}
		i++
		y := 0
		for ; j < len(version2) && version2[j] != '.'; j++ {
			y = y*10 + int(version2[j]-'0')
		}
		j++
		if x > y {
			return 1
		}
		if x < y {
			return -1
		}
	}
	return 0
}