Sum of Two Arrays

#1

could not figure out doubt.

#2
#3

changed the code .any short and efficient method possible?

#4

Your code still gives wrong answer for certain test cases like
3
5 5 5
3
5 5 5

#5
#6

changed the code .any short and efficient method possible?

#7

there is just a single approach to this question. The one that you have coded.