Given two arrays A and B, find the number of different numbers can reach by adding exactly one element in A and exactly one form B. Constraints: 1) |A|,|B| <= 2*10^5 2) 0 <= A_i,B_i <= 2*10^5 3) No two elements in A and nor from B is same, However may be same numbers in A and B;
For example: A = [1,3,5] B = [1,3,7] ans = 6, [2,4,6,8,10,12]