#include
using namespace std;
int main() {
// your code goes here
// your code goes here
int i,t,a[t],b[t],diff[t],res = 0;
cin>>t;
for(i = 0;i<t ; i++)
{
cin>>a[i]>>b[i];
}
for(i=0 ; i<t ; i++)
{
if(a[i]>b[i])
{
diff[i] = a[i] - b[i];
}
else
{
diff[i] = b[i] - a[i];
}
}
for(i=0 ; i<t ; i++)
{
res = max(res , diff[i]);
}
for(i=0 ; i<t ; i++)
{
if(a[i]-b[i] == res)
{
cout<<1<<endl;
break;
}
else if(b[i]-a[i] == res)
{
cout<<2<<endl;
break;
}
}
cout<<res;
return 0;
}