Description

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

You may assume that each input would have exactly one solution, and you may not use the same element twice.

Example:

Given nums = [2, 7, 11, 15], target = 9,

Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].

My Answer

class Solution {
    func twoSum(_ nums: [Int], _ target: Int) -> [Int] {
        for index in 0..<nums.count {
            let num = nums[index];
            for x in index + 1..<nums.count {
                let otherNum = nums[x]
                if num + otherNum == target {
                    return [index, x]
                }
            }
        }
        return []
    }
}

 

Source

Two Sum.playground