Simple input problem in fundamental challenges

#1

Simple input challenge
the question is saying that stops input when sum becomes negative
while in sample input
1
2
88
-100
49

according to question the input should stops after -100. why 49 is there?

#2

I think that the question may contain any number of inputs…but you should only take input in the program until the sum becomes negative or as specified in the question…post the link to the question for any specific details.