#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
bool cmpf(pair<int,int> x,pair<int,int> y){
return x.second < y.second;
}
int prefmin[200005];
int sufmin[200005];
long long plan_roller_coaster(vector<int> s, vector<int> t) {
int n = (int) s.size();
vector<pair<int,int> > com;
for(int i = 0; i < n; i++){
com.push_back(make_pair(s[i],t[i]));
}
sort(com.begin(), com.end(), cmpf);
long long ans = 0ll;
for(int i = 0; i < n; i++){
ans += t[i];
ans -= s[i];
}
prefmin[0] = s[0];
for(int i = 1; i < n; i++){
prefmin[i] = min(prefmin[i-1], s[i]);
}
sufmin[n-1] = s[n-1];
for(int i = n-2; i >= 0; i--){
sufmin[i] = min(sufmin[i+1], s[i]);
}
ans = min(ans, ans - t[0] + sufmin[1]);
for(int i = 1; i < n; i++){
ans = min(ans, ans - t[i] + min(prefmin[i-1], sufmin[i+1]));
}
return ans;
}
