# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
385294 | ngpin04 | Crocodile's Underground City (IOI11_crocodile) | C++14 | 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>
#include "crocodile.h"
//#include "crocodile.cpp"
#include "grader.cpp"
#define fi first
#define se second
#define mp make_pair
using namespace std;
const int NN = 1e5 + 5;
const int oo = 1e9 + 1;
vector <pair <int, int>> adj[NN];
int dis[NN][3];
int n;
int travel_plan(int n, int m, int r[][2], int l[], int k, int p[])
{
for (int i = 0; i < m; i++) {
int u = r[i][0];
int v = r[i][1];
int w = l[i];
adj[u].push_back(mp(v, w));
adj[v].push_back(mp(u, w));
}
for (int i = 0; i < n; i++)
for (int j = 0; j < 3; j++)
dis[i][j] = oo;
priority_queue <pair <int, int>> heap;
for (int i = 0; i < k; i++)
for (int j = 0; j < 2; j++) {
dis[p[i]][j] = 0;
if (j == 1)
heap.push(mp(0, p[i]));
}
while (heap.size()) {
int u = heap.top().se;
int cur = -heap.top().fi;
heap.pop();
if (dis[u][1] != cur)
continue;
for (pair <int, int> e : adj[u]) {
int v = e.fi;
int w = e.se;
bool ok = false;
dis[v][2] = cur + w;
for (int i = 2; i >= 1; i--)
if (dis[v][i] < dis[v][i - 1])
swap(dis[v][i], dis[v][i - 1]), ok = true;
if (ok)
heap.push(mp(-dis[v][1], v));
if (v == 0){
//cerr << u << " " << v << " " << w << endl;
//for (int i = 0; i < 3; i++)
// cerr << dis[0][i] << " ";
//cerr << endl;
}
}
}
return dis[0][1];
}