edo_ricky.go

package main

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

func main() {
	str := "845674"
	seq := strings.Split(str, "")

	var lastIndex = 0
	var toBePrinted = []string{}

	for i, s := range seq {
		curr, _ := strconv.Atoi(s)

		if i == 0 {
			toBePrinted = append(toBePrinted, s)
		} else if len(seq) - 1 != i {
			prev, _ := strconv.Atoi(seq[i-1])
			next, _ := strconv.Atoi(seq[i+1])

			if curr > prev && curr < next || curr > next && curr > prev {
				toBePrinted[lastIndex] = toBePrinted[lastIndex] + s
			} else if curr > next || curr < prev {
				toBePrinted = append(toBePrinted, s)
				lastIndex++
			} 
		} else {
			prev, _ := strconv.Atoi(seq[i-1])

			if curr > prev {
				toBePrinted[lastIndex] = toBePrinted[lastIndex] + s
			} else  {
				toBePrinted = append(toBePrinted, s)
				lastIndex++
			}
		}
	}


	fmt.Println(toBePrinted)
}