#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;

int n,l,r,mi,mx,ans1,ans2,cnt1,cnt2,s1,s2,now1,now2;
int main()
{
	scanf("%d",&n);
	for(register int i=1;i<=n;++i)
	{
		scanf("%d %d",&l,&r);
		if(l==r) continue;
		if(l>r)
		{
			if(l-r>mi) mi=l-r,now1=i;
		}
		else
		{
			if(r-l>mx) mx=r-l,now2=i;
		}
		s1+=l,s2+=r;
	}
	if(s1>s2)
	{
		if(s1-s2+2*mx>abs(s1-s2-2*mi))
		printf("%d\n",now2);
		else printf("%d\n",now1);
	}
	else 
	{
		if(s2-s1+2*mi>abs(s2-s1-2*mx))
		printf("%d\n",now1);
		else printf("%d\n",now2);
	}
	return 0;
}