Confusion in #1

[amritansh24]

Hi there,
Regarding the problem #1, i am wondering in the second method why not check the remaining value against the primary array and not in knownnumbers.
Is there any specific case which i am missing?

[ebertn]

@amritansh24 I believe you could do it either way, but you still need to keep track of the numbers you have seen in the array before.