int main()
{
int x[100],y[100],n,i,j,a,b,c,d,p;
scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%d %d",&x[i],&y[i]);}
for(i=n-1;i>=0;i--){
for(j=0;j<i;j++){
if(x[j]>x[j+1]){
a=x[j+1];
x[j+1]=x[j];
x[j]=a;}
if(y[j]>y[j+1]){
b=y[j+1];
y[j+1]=y[j];
y[j]=b;}}}
c=x[0];
d=y[n-1];
for(double k=c;k<=d;k+=0.1){
p=0;
for(i=0;i<n;i++){
if(k>=x[i]&&k<=y[i])
p++;}
if(p==0){
printf("no");
return 0;}
}
printf("%d %d",c,d);
return 0;
}
