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<=b[k])&&(z>=a[k])){x=1;}}
     c*=x;d++;x=0;
}
if(c==0){printf("no");}
else{printf("%d %d",zuo,you);}
                     

return 0;
}
