// Package q3612 implements a solution for https://leetcode.com/problems/process-string-with-special-operations-i/
package q3612

import "slices"

func processStr(s string) string {
	ret := make([]byte, 0, len(s)*2)

	for i := range len(s) {
		switch s[i] {
		case '*':
			ret = ret[:max(len(ret)-1, 0)]
		case '#':
			ret = append(ret, ret...)
		case '%':
			slices.Reverse(ret)
		default:
			ret = append(ret, s[i])
		}
	}

	return string(ret)
}

var _ = processStr