n = int(input())
ma = 0
v = [0] * n
w = [0] * n
for i in range(n):
    v[i], w[i] = map(int, input().split())
for i in range(n):
    if w[i] == 1:
        ma = max(ma, v)
for i in range(n):
    if ma * w[i] < v[i]:
        print('No')
        break
else:
    print('Yes')