N=int(input())
C=[]
t=0
max=0
for i in range(N):
    C.append(list(map(int,input().split())))
C.sort()
A=C[0][0]
B=C[N-1][1]
for i in range(A,B+1):
    for j in range(N):
        if i==C[j][0]:
            t+=1
        if i==C[j][1]:
            t-=1
        if t>max:
            max=t
            z=i
print(z)