CODE EXAMPLE FOR SWIFT

two sum problem

vector<int> twoSum(vector<int>& nums, int target) {
    int len = nums.size();
    for(int i = 0; i < len; i++) {
        for(int j = i + 1; j < len; j++) {
            if(nums[j] == target - nums[i])
                return { i, j };
        }
    }
    return {-1, -1};
};