#include<bits/stdc++.h>
using namespace std;
using ll=long long;
int main(){
	ll n;
	cin>>n;
	bool ans=0;
	map<ll,vector<ll>> v;
	ll mini=100000000000000;
	for(int i=0;i<n;i++){
		ll a,b;
		cin>>a>>b;
		v[a].push_back(b);
		mini=min(mini,a);
	}
	ll now=-1;
	for(int i=mini;i<2*mini;i++){
		if(v[i].size()==0){
			cout<<"No"<<endl;
			return 0;
		}
		ll cnt=-1;
		for(int j=0;j<v[i].size();j++){
			if(v[i][j]>now) cnt=max(cnt,v[i][j]);
		}
		if(cnt==-1){
			cout<<"No"<<endl;
			return 0;
		}
		now=cnt;
	}
	cout<<"Yes"<<endl;
}