package main

import . "fmt"
import . "math/big"

func main() {
	var n int
	Scan(&n)
	var a *Int
	for i:=0;i<n; i++ {
		var v,w int64
		Scan(&v,&w)
		if i > 0 {
			a.GCD(nil,nil,a,NewInt(w))
		} else {
			a = NewInt(w)
		}
	}
	if a.Cmp(NewInt(1)) == 0 {
		Println("Yes")
	} else {
		Println("No")
	}
}