#include "railroad.h"
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define pill pair<ll, ll>
#define mp make_pair
#define f first
#define s second
using namespace std;
ll plan_roller_coaster(vector<int> s, vector<int> t) {
vector<pill> z;
int n = (int) s.size();
ll dp[1<<n][n];
for(int i = 0; i < (1<<n); i++) {
for(int j = 0; j < n; j++)
dp[i][j] = 1e15;
}
for(int i = 0; i < n; i++)
dp[(1<<i)][i] = 0;
ll ans = 1e15;
for(int i = 1; i < (1<<n); i++) {
for(int j = 0; j < n; j++) {
if((1<<j)&i) {
for(int k = 0; k < n; k++) {
if((1<<k)&i)continue;
dp[i^(1<<k)][k] = min(dp[i^(1<<k)][k], dp[i][j] + max(0, t[j] - s[k]));
}
}
if(i == (1<<n) - 1) {
ans = min(ans, dp[i][j]);
}
}
}
return ans;
}
/*
4
1 7
4 3
5 8
6 6
*/
