Hi. Don't know about #4 test can anyone help me to figure out what set of numbers it has to be?
if input will be
1
1
answer suppose to be 1? Because 1 - 0 = 1?

Obviously, 0
1 - 1

The first 1 is number of stones, so there is one stone with weight 1. Thus, I think that right answer must be 1.