The problem statement is "The input will always be valid (numbers will be an array of length 2 or greater, and all of the items will be numbers; target will always be the sum of two different items from that array)."

The input can be repeated numbers, i.e if target is 4 , input can be [2,2,1,3] . The above solution gives (0,1) , but actual ans is(2,3) as target will always be the sum of two different items from that array.