function runLengthEncoding(text: string): string {
  if (text.length === 0) return ''
  
  let result = ''
  let currentChar = text[0]
  let charCount = 1

  for (let i = 1; i < text.length; i++) {
    if (currentChar === text[i]) charCount++
    else {
      result += `${charCount}${currentChar}`
      currentChar = text[i]
      charCount = 1
    }
  }
  result += `${charCount}${currentChar}`

  return result;
}

// No modificar: necesario para evaluar el resultado.
export { runLengthEncoding };