#include "bits/stdc++.h"
#define int long long
using namespace std;
int d[200001];
const int mod = 1e9 + 7;
int pw(int a, int b){
int ret = 1 % mod;
a %= mod;
while(b) {
if(b & 1LL) ret = ret * a % mod;
a = a * a % mod;
b >>= 1;
}
return ret;
}
int inv(int a){
return pw(a, mod - 2);
}
int mul(int a, int b){
return (a * b) % mod;
}
signed main(){ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int n;
cin>>n;
vector<int> a(n), b(n);
for(auto&x: a){
cin>>x;
}
for(auto&x: b){
cin>>x;
}
for(int i{}; i < n; ++i){
d[i] = mul(b[i], inv(a[i]));
}
map<int,int> freq;
int ans = 0, add = 0;
for(int i{}; i < n; ++i){
if(!a[i]){
if(!b[i])
++add;
continue;
}
++freq[d[i]];
ans = max(ans, freq[d[i]]);
}
cout<<(ans + add)<<'\n';
return 0;
}