#include <iostream>
#include <vector>
#include <queue>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define MAXN 100001
#define INF 4600000000000000000
ll n, m, s, t, u, v;
vector<vector<pll>> adj(MAXN);
vector<ll> distu(MAXN), distv(MAXN), dists(MAXN);
vector<vector<ll>> dp(2, vector<ll>(MAXN));
ll answer;
vector<bool> visited(MAXN, false);
void dijkstra1(ll start, vector<ll>& dist) {
visited = vector<bool>(MAXN, false);
priority_queue<pll, vector<pll>, greater<pll>> pq;
pq.push({0, start});
while (!pq.empty()) {
ll cdist = pq.top().first;
ll node = pq.top().second;
pq.pop();
if (!visited[node]) {
dist[node] = cdist;
visited[node] = true;
for (auto i : adj[node]) {
pq.push({cdist + i.second, i.first});
}
}
}
}
void dijkstra2(ll start, ll end) {
dp[0] = vector<ll>(MAXN, INF);
dp[1] = vector<ll>(MAXN, INF);
visited = vector<bool>(MAXN, false);
priority_queue<pair<ll, pll>, vector<pair<ll, pll>>, greater<pair<ll, pll>>> pq;
pq.push({0, {start, 0}});
dp[0][0] = INF;
dp[1][0] = INF;
while (!pq.empty()) {
ll cdist = pq.top().first;
ll node = pq.top().second.first;
ll par = pq.top().second.second;
pq.pop();
if (!visited[node]) {
visited[node] = true;
dists[node] = cdist;
dp[0][node] = min(distu[node], dp[0][par]);
dp[1][node] = min(distv[node], dp[1][par]);
for (auto i : adj[node]) {
pq.push({cdist + i.second, {i.first, node}});
}
}
else if (cdist == dists[node]) {
if (min(distu[node], dp[0][par]) + min(distv[node], dp[1][par]) <= dp[0][node] + dp[1][node]) {
dp[0][node] = min(distu[node], dp[0][par]);
dp[1][node] = min(distv[node], dp[1][par]);
}
}
}
answer = min(answer, dp[0][end] + dp[1][end]);
}
int main() {
cin >> n >> m >> s >> t >> u >> v;
for (int i = 0; i < m; i++) {
ll a, b, cdist;
cin >> a >> b >> cdist;
adj[a].push_back({b, cdist});
adj[b].push_back({a, cdist});
}
dijkstra1(u, distu);
dijkstra1(v, distv);
answer = distu[v];
dijkstra2(s, t);
cout << answer << endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
581 ms |
31028 KB |
Output is correct |
2 |
Correct |
518 ms |
29976 KB |
Output is correct |
3 |
Correct |
546 ms |
26176 KB |
Output is correct |
4 |
Correct |
620 ms |
30000 KB |
Output is correct |
5 |
Correct |
504 ms |
25672 KB |
Output is correct |
6 |
Correct |
577 ms |
30808 KB |
Output is correct |
7 |
Correct |
514 ms |
29820 KB |
Output is correct |
8 |
Correct |
518 ms |
29656 KB |
Output is correct |
9 |
Correct |
586 ms |
31336 KB |
Output is correct |
10 |
Correct |
586 ms |
31396 KB |
Output is correct |
11 |
Correct |
182 ms |
14516 KB |
Output is correct |
12 |
Correct |
569 ms |
31364 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
553 ms |
30000 KB |
Output is correct |
2 |
Correct |
509 ms |
26168 KB |
Output is correct |
3 |
Correct |
510 ms |
26660 KB |
Output is correct |
4 |
Correct |
521 ms |
26132 KB |
Output is correct |
5 |
Correct |
512 ms |
26180 KB |
Output is correct |
6 |
Correct |
517 ms |
26440 KB |
Output is correct |
7 |
Correct |
508 ms |
26536 KB |
Output is correct |
8 |
Correct |
512 ms |
26036 KB |
Output is correct |
9 |
Correct |
519 ms |
26780 KB |
Output is correct |
10 |
Correct |
510 ms |
26084 KB |
Output is correct |
11 |
Correct |
226 ms |
14640 KB |
Output is correct |
12 |
Correct |
519 ms |
26272 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
50 ms |
9796 KB |
Output is correct |
2 |
Correct |
5 ms |
7356 KB |
Output is correct |
3 |
Correct |
5 ms |
7356 KB |
Output is correct |
4 |
Correct |
93 ms |
12800 KB |
Output is correct |
5 |
Correct |
48 ms |
10676 KB |
Output is correct |
6 |
Correct |
7 ms |
7484 KB |
Output is correct |
7 |
Correct |
9 ms |
7484 KB |
Output is correct |
8 |
Correct |
10 ms |
7612 KB |
Output is correct |
9 |
Correct |
7 ms |
7612 KB |
Output is correct |
10 |
Correct |
50 ms |
9832 KB |
Output is correct |
11 |
Correct |
5 ms |
7372 KB |
Output is correct |
12 |
Correct |
5 ms |
7356 KB |
Output is correct |
13 |
Correct |
6 ms |
7372 KB |
Output is correct |
14 |
Correct |
6 ms |
7452 KB |
Output is correct |
15 |
Correct |
6 ms |
7356 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
581 ms |
31028 KB |
Output is correct |
2 |
Correct |
518 ms |
29976 KB |
Output is correct |
3 |
Correct |
546 ms |
26176 KB |
Output is correct |
4 |
Correct |
620 ms |
30000 KB |
Output is correct |
5 |
Correct |
504 ms |
25672 KB |
Output is correct |
6 |
Correct |
577 ms |
30808 KB |
Output is correct |
7 |
Correct |
514 ms |
29820 KB |
Output is correct |
8 |
Correct |
518 ms |
29656 KB |
Output is correct |
9 |
Correct |
586 ms |
31336 KB |
Output is correct |
10 |
Correct |
586 ms |
31396 KB |
Output is correct |
11 |
Correct |
182 ms |
14516 KB |
Output is correct |
12 |
Correct |
569 ms |
31364 KB |
Output is correct |
13 |
Correct |
553 ms |
30000 KB |
Output is correct |
14 |
Correct |
509 ms |
26168 KB |
Output is correct |
15 |
Correct |
510 ms |
26660 KB |
Output is correct |
16 |
Correct |
521 ms |
26132 KB |
Output is correct |
17 |
Correct |
512 ms |
26180 KB |
Output is correct |
18 |
Correct |
517 ms |
26440 KB |
Output is correct |
19 |
Correct |
508 ms |
26536 KB |
Output is correct |
20 |
Correct |
512 ms |
26036 KB |
Output is correct |
21 |
Correct |
519 ms |
26780 KB |
Output is correct |
22 |
Correct |
510 ms |
26084 KB |
Output is correct |
23 |
Correct |
226 ms |
14640 KB |
Output is correct |
24 |
Correct |
519 ms |
26272 KB |
Output is correct |
25 |
Correct |
50 ms |
9796 KB |
Output is correct |
26 |
Correct |
5 ms |
7356 KB |
Output is correct |
27 |
Correct |
5 ms |
7356 KB |
Output is correct |
28 |
Correct |
93 ms |
12800 KB |
Output is correct |
29 |
Correct |
48 ms |
10676 KB |
Output is correct |
30 |
Correct |
7 ms |
7484 KB |
Output is correct |
31 |
Correct |
9 ms |
7484 KB |
Output is correct |
32 |
Correct |
10 ms |
7612 KB |
Output is correct |
33 |
Correct |
7 ms |
7612 KB |
Output is correct |
34 |
Correct |
50 ms |
9832 KB |
Output is correct |
35 |
Correct |
5 ms |
7372 KB |
Output is correct |
36 |
Correct |
5 ms |
7356 KB |
Output is correct |
37 |
Correct |
6 ms |
7372 KB |
Output is correct |
38 |
Correct |
6 ms |
7452 KB |
Output is correct |
39 |
Correct |
6 ms |
7356 KB |
Output is correct |
40 |
Correct |
577 ms |
30812 KB |
Output is correct |
41 |
Correct |
587 ms |
31292 KB |
Output is correct |
42 |
Correct |
577 ms |
31348 KB |
Output is correct |
43 |
Correct |
189 ms |
14756 KB |
Output is correct |
44 |
Correct |
191 ms |
14592 KB |
Output is correct |
45 |
Correct |
511 ms |
25024 KB |
Output is correct |
46 |
Correct |
515 ms |
24764 KB |
Output is correct |
47 |
Correct |
565 ms |
26444 KB |
Output is correct |
48 |
Correct |
177 ms |
14072 KB |
Output is correct |
49 |
Correct |
558 ms |
29312 KB |
Output is correct |
50 |
Correct |
508 ms |
25076 KB |
Output is correct |
51 |
Correct |
507 ms |
25172 KB |
Output is correct |