of his friends.is participating in a push-up contest with
Each participant does a unique number of push-ups between and . However, was too busy organizing DMPG and unfortunately forgot how many push-ups he did!
Asis worried about whether or not , with his wonderfully toned figure and boyish charm, won the contest, help him figure out how many push ups he did, given the number of push ups done by the other participants.
The first line of input with consist of integer, .
The next lines will consist of the number of push-ups that each of 's friends did.
The number of push-ups thatdid.
5 1 2 3 5