#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second
#define f first
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
const ll inf = 1e18, N = 1e6;
vector<int> ord, was(N), g[N];
void dfs(int u) {
was[u] = 1;
for (int to: g[u]) {
if (!was[to]) dfs(to);
}
ord.push_back(u);
}
long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
int n = sz(s);
if (n <= 16) {
ll dp[1 << n][n];
for (int msk = 0; msk < (1 << n); msk++) {
for (int i = 0; i < n; i++) {
dp[msk][i] = inf;
}
}
for (int i = 0; i < n; i++) dp[1 << i][i] = 0;
for (int msk = 1; msk < (1 << n); msk++) {
for (int i = 0; i < n; i++) {
if (msk >> i & 1) {
for (int j = 0; j < n; j++) {
if (msk >> j & 1) continue;
int msk1 = msk + (1 << j);
dp[msk1][j] = min(dp[msk1][j], dp[msk][i] + max(0, t[i] - s[j]));
}
}
}
}
ll ans = inf;
for (int i = 0; i < n; i++) ans = min(ans, dp[(1 << n) - 1][i]);
return ans;
}
vector<pii> a;
for (int i = 0; i < n; i++) a.push_back({t[i], s[i]});
sort(all(s));
for (int i = 0; i < n; i++) {
g[i + n].push_back(i);
if (i) g[i + n].push_back(i + n - 1);
int p = upper_bound(all(a), {s[i], 0}) - a.begin() - 1;
if (p >= 0) g[p + n - 1].push_back(i);
}
for (int i = 0; i < n; i++) {
if (!was[i]) dfs(i);
}
reverse(all(ord));
int lst = ord[0];
for (int i = 1; i < sz(ord); i++) {
if (ord[i] >= n) continue;
if (a[ord[i]].s < a[lst].f) return 1;
lst = ord[i];
}
return 0;
}
Compilation message
shortcut.cpp:1:10: fatal error: railroad.h: No such file or directory
1 | #include "railroad.h"
| ^~~~~~~~~~~~
compilation terminated.
