求助ABCT2

#include<bits/stdc++.h>
//#define int long long
using namespace std;
long long n,p,q,a[105];
signed main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	ios::sync_with_stdio(0);
	cin.tie(0),cout.tie(0);
	cin>>n;
	for(int i=1;i<=n;++i) cin>>a[i];
	p=a[2],q=a[1];
	p/=__gcd(p,q),q/=__gcd(p,q);
	for(int i=3;i<=n;++i){
		long long p1=a[i],q1=a[i-1];
		p1/=__gcd(p1,q1),q1/=__gcd(p1,q1);
		if(p!=p1 || q!=q1){
			cout<<"No\n";
			return 0;
		}		
	}
	cout<<"Yes\n";
	return 0;
}