N=int(input())
L=[[] for i in range(N)]
V=0
for i in range(N):
    L[i]=list(map(int,input().split()))
    if L[i][1]==1:
        V=L[i][0]
flag=1
for i in range(N):
    if L[i][0]>V*L[i][1]:
        flag=0
if flag:
    print("Yes")
else:
    print("No")