int main(){
int n,i,k;
int a[50000],b[50000];
scanf("%d",&n);
for(i=0;i<n;i++){
	scanf("%d %d",&a[i],&b[i]);
}
for(k=1;k<n;k++){
	for(i=1;i<=n-k;i++){
		if(b[0]<a[i]||a[0]>b[i]){
		}else{
			if(a[0]<=a[i]){
				a[i]=a[n-k];
				a[n-k]=0;
			}else{
				a[0]=a[i];
				a[i]=a[n-k];
				a[n-k]=0;
			}
			if(b[0]>=b[i]){
				b[i]=b[n-k];
				b[n-k]=0;
			}else{
				b[0]=b[i];
				b[i]=b[n-k];
				b[n-k]=0;
			}
			break;
		}
	}
}
if(a[1]==0){
	printf("%d %d",a[0],b[0]);
}else{
	printf("no\n");
}
	return 0;
}
