n=int(input())
a=[int(n) for n in input().split(' ')]
k=list(set(a))
k=sorted(k)
print(k)
t=0
for i in k:
a.remove(i)
if (i-1) in a:
a.remove(i-1)
if (i+1) in a:
a.remove(i+1)
t=t+i
if(len(a)==0):
break
print(t)
bj1pbnQoaW5wdXQoKSkKYT1baW50KG4pIGZvciBuIGluIGlucHV0KCkuc3BsaXQoJyAnKV0Kaz1saXN0KHNldChhKSkKaz1zb3J0ZWQoaykKcHJpbnQoaykKdD0wCmZvciBpIGluIGs6CiAgICBhLnJlbW92ZShpKQogICAgaWYgKGktMSkgaW4gYToKICAgICAgICBhLnJlbW92ZShpLTEpCiAgICBpZiAoaSsxKSBpbiBhOiAgICAKICAgICAgICBhLnJlbW92ZShpKzEpCiAgICB0PXQraQogICAgaWYobGVuKGEpPT0wKToKICAgICAgICBicmVhawpwcmludCh0KQ==