프로그래머스 - 코드 처리하기 (Go)

---

package main

import (
	"fmt"
)

func main() {
	code := "abc1abc1abc"
	fmt.Print(solution(code))
}

func solution(code string) string {
	mode := 0
	answer := ""

	for i, c := range code {
		if c == '1' {
			mode = 1 - mode
			continue
		}

		if mode == 0 {
			if i%2 == 0 {
				answer += string(c)
			}
		} else {
			if i%2 != 0 {
				answer += string(c)
			}
		}
	}

	if answer == "" {
		return "EMPTY"
	}

	return answer
}