#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
    int N;
    cin>>N;
    vector<double> A(N),B(N),C(N),D(N);
    for(int i=0;i<N;i++) cin>>A[i]>>B[i];
    for(int i=0;i<N;i++) cin>>C[i]>>D[i];
    int a = *max_element(A.begin(),A.end())-*min_element(A.begin(),A.end());
    int b = *max_element(B.begin(),B.end())-*min_element(B.begin(),B.end());
    int c = *max_element(C.begin(),C.end())-*min_element(C.begin(),C.end());
    int d = *max_element(D.begin(),D.end())-*min_element(D.begin(),D.end());
    if(a > b) swap(a,b);
    if(c > d) swap(c,d);
    cout<<fixed<<setprecision(15)<<d/b<<endl;
}