N = int(input())
A = []
for i in range(N):
    A += [i for i in input().split()]
a_max = max(A)
a_count = A.count(a_max)
if len(A) <= 2 and len(set(A)) == 2:
    print("YES")
elif a_count >= len(A) // 2:
    print("NO")
else:
    print("YES")