script

package main

import (
    "fmt"
    "strconv"
    "strings"
)

type Data struct {
    ListingNumber []int
    ResultNumber []int
    Number int
    Start int
}

func main() {
    fmt.Println("Starting ...")
    data := &Data{}

    data.Start = 5
    data.Running()

    fmt.Println("Result : ",data.ResultNumber)
}

func (a *Data) Running() {
    startingProcess := 100

    for len(a.ResultNumber) < a.Start {
        a.Number = startingProcess
        _ = a.OneNumber()
        startingProcess++
    }
}

func (a *Data)OneNumber() bool {
    var stop = false
    var one_number = false
    var stateNumber = a.Number

    for !stop {
        num := strconv.Itoa(a.Number)
        b := strings.Split(num,"")
        result := a.Iteration(b)

        if result != 1 {
            // Check value exists or no ? if Exist number not "One Number"
            check := a.Validate(result)
            if check > 1 {
                stop = true
            }
        }else{
            stop = true
            one_number = true
            a.ResultNumber = append(a.ResultNumber, stateNumber)
        }
    }

    return one_number
}

func (a *Data)Iteration(data []string) int {
    value := 0
    for _, v := range data {
        number,_ := strconv.Atoi(v)
        value = value + (number*number)
    }

    a.ListingNumber = append(a.ListingNumber,value)
    a.Number = value
    return value
}

func (a *Data)Validate(data int) int{
    value := 0
    a.ListingNumber = a.ListingNumber[:cap(a.ListingNumber)]
    for _, v := range a.ListingNumber {
        if v == data {
            value++
        }
    }

    return value
}