#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main() {
int n; cin >> n;
vector<int> x(n), y(n), a, b;
for(int i=0; i<n; i++) {
cin >> x[i];
for(int j=0; j<x[i]; j++) a.push_back(i);
}
for(int i=0; i<n; i++) {
cin >> y[i];
for(int j=0; j<y[i]; j++) b.push_back(i);
}
// for(auto x : a) cout << x << ' ';
// cout << endl << endl;
int bb=b.size(), ans=-1e12;
for(int j=0; j<bb; j++) {
// for(auto x : b) cout << x << ' ';
// cout << endl;
int cur=0;
for(int i=0; i<b.size(); i++) {
if(a[i] < b[i]) cur++;
else if(a[i] > b[i]) cur--;
}
ans=max(ans, cur);
b.push_back(b[j]);
b.erase(b.begin());
}
cout << ans;
return 0;
}
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