func twoSum(_ numbers: [Int], _ target: Int) -> [Int] {

let sortedNumbersWithIndex = numbers.enumerated().sorted { lhs, rhs in

lhs.element < rhs.element

}

var left = 0

var right = sortedNumbersWithIndex.endIndex - 1

while left < right {

let sum = sortedNumbersWithIndex[left].element + sortedNumbersWithIndex[right].element

if sum == target { break }

if sum < target {

left += 1

} else {

right -= 1

}

}

return [sortedNumbersWithIndex[left].offset, sortedNumbersWithIndex[right].offset]

}