int main(){
	int a[50000],b[50000],n,zuo,you,y,x=0,c=1,d=0;
	double z;
	scanf("%d",&n);
	for(int i=0;i<n;i++)
	{scanf("%d%d",&a[i],&b[i]);}
	zuo=a[1];you=b[1];
	for(int j=0;j<n;j++)
	{if(a[j]<zuo)zuo=a[j];
	 if(b[j]>you)you=b[j];}
	z=zuo;
	y=you;
	for(z;z<=y;z+=0.5){
		for(int k=0;k<n;k++)
		{if((z<=1.0*b[k])&&(z>=1.0*a[k])){x=1;}}
	     c*=x;d++;x=0;
	}
	if(c==0){printf("no");}
		else{printf("%d %d",zuo,you);}
	                     
	
	return 0;
}