#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<to;x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

int N;
pair<ll,ll> P[1010];

ll val(ll x) {
	ll ma=0,mi=1LL<<60;
	int i;
	if(x<1) return 1LL<<60;
	FOR(i,N) ma=max(ma,P[i].first*x+P[i].second);
	FOR(i,N) mi=min(mi,P[i].first*x+P[i].second);
	return ma-mi;
}

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>N;
	FOR(i,N) {
		cin>>x>>y;
		P[i]=make_pair(y,x);
	}
	
	ll ret=1;
	ll L=1,R=1LL<<30;
	ll mi=val(L);
	FOR(i,200) {
		ll m1=(L*2+R)/3;
		ll m2=(L+R*2)/3;
		ll v1=val(m1);
		ll v2=val(m2);
		if(v1<mi) ret=m1,mi=v1;
		if(v2<mi) ret=m2,mi=v2;
		
		if(v1==v2) L=m1, R=m2;
		else if(v1<v2) R=m2;
		else L=m1;
	}
	
	for(x=L-10;x<=L+100;x++) {
		ll v=val(x);
		if(v<mi) ret=x,mi=v;
	}
	for(x=R-100;x<=R+10;x++) {
		ll v=val(x);
		if(v<mi) ret=x,mi=v;
	}
	cout<<ret<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false);
	FOR(i,argc-1) s+=argv[i+1],s+='\n';
	FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	solve(); return 0;
}