#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
#define sp " "
#define endl "\n"
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define N 17
#define ll long long
ll dp[(1<<N)][N];
const ll INF = 2e18 + 7;
long long plan_roller_coaster(vector<int> s, vector<int> t) {
int n = (int) s.size();
if (n >= N) return 0;
for (int i = 0; i < n; i++)
dp[(1<<n) - 1][i] = 0;
for (int i = (1<<n) - 2; i > 0; i--){
for (int j = 0; j < n; j++){
if (i & (1<<j)){
dp[i][j] = INF;
for (int k = 0; k < n; k++){
if (i & (1<<k)) continue;
dp[i][j] = min(dp[i][j], dp[i | (1<<k)][k] + max((int)0, t[j] - s[k]));
}
}
}
}
ll ans = INF;
for (int i = 0; i < n; i++) ans = min(ans, dp[(1<<i)][i]);
return ans;
}
