| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 926813 | tomb | Crocodile's Underground City (IOI11_crocodile) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define vi vector<int>
#define vb vector<bool>
#define vvb vector<vb>
#define pli pair<ll, int>
#define pil pair<int, ll>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vpii vector<pii>
#define vpli vector<pli>
#define vpil vector<pil>
#define vpll vector<pll>
#define ll long long
#define vll vector<ll>
#define vvll vector<vll>
#define f first
#define s second
#define pb push_back
#define MAXN (int) 1e5
ll travel_plan(int n, int m, int **R, int *L, int k, int *P){
vector<vpll> adj(n);
for (int i = 0; i < m; i++)
adj[R[i][0]].pb({R[i][1], L[i]}), adj[R[i][1]].pb({R[i][0], L[i]});
priority_queue<pli, vpli, greater<pli>> pq;
pq.push({0, 0});
vll dist(n, 2e18), dist2(n, 2e18), par(n, -1);
vb vis(n);
dist[0] = dist2[0] = 0;
while (pq.size()){
int u; ll w;
tie (w, u) = pq.top();
if (vis[u]) continue;
vis[u] = true;
pq.pop();
for (auto [v, cost] : adj[u]){
if (dist[v] > dist[u] + cost)
pq.push({dist[v] = dist[u] + cost, v}), par[v] = u;
}
}
vis.assign(n, 0);
while (pq.size()){
int u; ll w;
tie (w, u) = pq.top();
if (vis[u]) continue;
vis[u] = true;
pq.pop();
for (auto [v, cost] : adj[u]){
if (dist2[v] > dist2[u] + cost && par[v] != u)
pq.push({dist2[v] = dist2[u] + cost, v});
}
}
ll min_cost = LLONG_MAX;
for (int i = 0; i < k; i++)
min_cost = min(min_cost, dist2[P[i]]);
return min_cost;
}