#include<iostream>
using namespace std;
int n,m,num=0;
int a[10000005];
int b[10000005];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		cin>>b[i];
		for(int j=i;j<=n;j++){
			if(a[i]==b[j]){
				swap(b[i],b[j]);
				if(a[i]==b[i]){
					num++;
				}
			}
		}
	}
	if(num%2==0){
		cout<<"Yes"<<endl;
	}else{
		cout<<"No"<<endl;
	}
	
    return 0;
}

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