l=[]
n=int(input())
for i in range(n):
    ls=list(map(int,input().split()))
    l.extend(ls)
l.sort()
for i in range(len(l)):
    t=l[i]
    if l.count(t)!=1:
        c=t
l=list(set(l))
for i in range(len(l)-1):
    if l[i+1]-l[i]!=1:
        d=l[i]+1
print(d,c)