leetcode--539. Minimum Time Difference

Given a list of -hour clock time points in "Hour:Minutes" format, find the minimum minutes difference between any two time points in the list.

Example :
Input: ["23:59","00:00"]

const MaxMinute =  * 

func findMinDifference(slice1 []string) int {
    min := MaxMinute

    ts := make([]int, *MaxMinute)
    for _, v := range slice1 {
        ts[getMinute(v)] ++
        if ts[getMinute(v)]=={
            return
        }
        ts[getMinute(v)+MaxMinute]++
    }

    front, rear := ,
    for front < MaxMinute* {
        if front == rear || ts[front] ==  {
            front++
            continue
        }
        if ts[rear] ==  {
            rear++
            continue
        }

        if min > front-rear {
            min = front - rear
        }
        rear = front
        front ++
    }

    return min
}

func getMinute(timestr string) int {
        return ((int(timestr[]-''))*+int(timestr[]-''))*+(int(timestr[]-''))*+int(timestr[]-'')
}

Output: