#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
vector<pair<ll, ll>> graph[100001];
ll du[100001], dv[100001], ds[100001], dp[2][100001], ans;
bool visited[100001];
void dijkstra1(ll start, ll arr[]) {
fill(visited, visited + 100001, false);
priority_queue<pair<ll, ll>> pq;
pq.push({0, start});
while (!pq.empty()) {
ll c, node;
tie(c, node) = pq.top();
pq.pop();
if (!visited[node]) {
arr[node] = -c;
visited[node] = true;
for (auto& i : graph[node]) pq.push({c - i.second, i.first});
}
}
}
void dijkstra2(ll start, ll end) {
fill(dp[0], dp[0] + 100001, LLONG_MAX / 2);
fill(dp[1], dp[1] + 100001, LLONG_MAX / 2);
fill(visited, visited + 100001, false);
priority_queue<pair<ll, pair<ll, ll>>> pq;
pq.push({0, {start, 0}});
dp[0][0] = dp[1][0] = LLONG_MAX/ 2;
while (!pq.empty()) {
ll c, node, par;
pair<ll, ll> p;
tie(c, p) = pq.top();
tie(node, par) = p;
pq.pop();
if (!visited[node]) {
visited[node] = true;
ds[node] = -c;
dp[0][node] = min(du[node], dp[0][par]);
dp[1][node] = min(dv[node], dp[1][par]);
for (auto i : graph[node]) pq.push({c - i.second, {i.first, node}});
} else if (-c == ds[node]) {
if (min(du[node], dp[0][par]) + min(dv[node], dp[1][par]) <= dp[0][node] + dp[1][node]) {
dp[0][node] = min(du[node], dp[0][par]);
dp[1][node] = min(dv[node], dp[1][par]);
}
}
}
ans = min(ans, dp[0][end] + dp[1][end]);
}
int main() {
iostream::sync_with_stdio(false);
cin.tie(0);
ll n, m, s, t, u, v;
cin >> n >> m >> s >> t >> u >> v;
for (int i = 0; i < m; i++) {
ll a, b, c;
cin >> a >> b >> c;
graph[a].push_back({b, c});
graph[b].push_back({a, c});
}
dijkstra1(u, du);
dijkstra1(v, dv);
ans = du[v];
dijkstra2(s, t);
dijkstra2(t, s);
cout << ans << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
575 ms |
27500 KB |
Output is correct |
2 |
Correct |
552 ms |
30292 KB |
Output is correct |
3 |
Correct |
584 ms |
29620 KB |
Output is correct |
4 |
Correct |
621 ms |
29748 KB |
Output is correct |
5 |
Correct |
568 ms |
26484 KB |
Output is correct |
6 |
Correct |
641 ms |
30368 KB |
Output is correct |
7 |
Correct |
531 ms |
29892 KB |
Output is correct |
8 |
Correct |
584 ms |
30208 KB |
Output is correct |
9 |
Correct |
648 ms |
31424 KB |
Output is correct |
10 |
Correct |
623 ms |
31512 KB |
Output is correct |
11 |
Correct |
157 ms |
13900 KB |
Output is correct |
12 |
Correct |
634 ms |
31496 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
611 ms |
27260 KB |
Output is correct |
2 |
Correct |
639 ms |
23376 KB |
Output is correct |
3 |
Correct |
537 ms |
26776 KB |
Output is correct |
4 |
Correct |
563 ms |
23432 KB |
Output is correct |
5 |
Correct |
724 ms |
23256 KB |
Output is correct |
6 |
Correct |
613 ms |
26440 KB |
Output is correct |
7 |
Correct |
616 ms |
23196 KB |
Output is correct |
8 |
Correct |
564 ms |
23336 KB |
Output is correct |
9 |
Correct |
546 ms |
23160 KB |
Output is correct |
10 |
Correct |
531 ms |
26548 KB |
Output is correct |
11 |
Correct |
195 ms |
12164 KB |
Output is correct |
12 |
Correct |
551 ms |
26516 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
51 ms |
7456 KB |
Output is correct |
2 |
Correct |
4 ms |
4328 KB |
Output is correct |
3 |
Correct |
4 ms |
4300 KB |
Output is correct |
4 |
Correct |
89 ms |
10616 KB |
Output is correct |
5 |
Correct |
44 ms |
8404 KB |
Output is correct |
6 |
Correct |
5 ms |
4556 KB |
Output is correct |
7 |
Correct |
7 ms |
4660 KB |
Output is correct |
8 |
Correct |
9 ms |
4752 KB |
Output is correct |
9 |
Correct |
6 ms |
4472 KB |
Output is correct |
10 |
Correct |
44 ms |
8372 KB |
Output is correct |
11 |
Correct |
4 ms |
4316 KB |
Output is correct |
12 |
Correct |
4 ms |
4340 KB |
Output is correct |
13 |
Correct |
4 ms |
4360 KB |
Output is correct |
14 |
Correct |
4 ms |
4428 KB |
Output is correct |
15 |
Correct |
4 ms |
4428 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
575 ms |
27500 KB |
Output is correct |
2 |
Correct |
552 ms |
30292 KB |
Output is correct |
3 |
Correct |
584 ms |
29620 KB |
Output is correct |
4 |
Correct |
621 ms |
29748 KB |
Output is correct |
5 |
Correct |
568 ms |
26484 KB |
Output is correct |
6 |
Correct |
641 ms |
30368 KB |
Output is correct |
7 |
Correct |
531 ms |
29892 KB |
Output is correct |
8 |
Correct |
584 ms |
30208 KB |
Output is correct |
9 |
Correct |
648 ms |
31424 KB |
Output is correct |
10 |
Correct |
623 ms |
31512 KB |
Output is correct |
11 |
Correct |
157 ms |
13900 KB |
Output is correct |
12 |
Correct |
634 ms |
31496 KB |
Output is correct |
13 |
Correct |
611 ms |
27260 KB |
Output is correct |
14 |
Correct |
639 ms |
23376 KB |
Output is correct |
15 |
Correct |
537 ms |
26776 KB |
Output is correct |
16 |
Correct |
563 ms |
23432 KB |
Output is correct |
17 |
Correct |
724 ms |
23256 KB |
Output is correct |
18 |
Correct |
613 ms |
26440 KB |
Output is correct |
19 |
Correct |
616 ms |
23196 KB |
Output is correct |
20 |
Correct |
564 ms |
23336 KB |
Output is correct |
21 |
Correct |
546 ms |
23160 KB |
Output is correct |
22 |
Correct |
531 ms |
26548 KB |
Output is correct |
23 |
Correct |
195 ms |
12164 KB |
Output is correct |
24 |
Correct |
551 ms |
26516 KB |
Output is correct |
25 |
Correct |
51 ms |
7456 KB |
Output is correct |
26 |
Correct |
4 ms |
4328 KB |
Output is correct |
27 |
Correct |
4 ms |
4300 KB |
Output is correct |
28 |
Correct |
89 ms |
10616 KB |
Output is correct |
29 |
Correct |
44 ms |
8404 KB |
Output is correct |
30 |
Correct |
5 ms |
4556 KB |
Output is correct |
31 |
Correct |
7 ms |
4660 KB |
Output is correct |
32 |
Correct |
9 ms |
4752 KB |
Output is correct |
33 |
Correct |
6 ms |
4472 KB |
Output is correct |
34 |
Correct |
44 ms |
8372 KB |
Output is correct |
35 |
Correct |
4 ms |
4316 KB |
Output is correct |
36 |
Correct |
4 ms |
4340 KB |
Output is correct |
37 |
Correct |
4 ms |
4360 KB |
Output is correct |
38 |
Correct |
4 ms |
4428 KB |
Output is correct |
39 |
Correct |
4 ms |
4428 KB |
Output is correct |
40 |
Correct |
636 ms |
30912 KB |
Output is correct |
41 |
Correct |
683 ms |
31268 KB |
Output is correct |
42 |
Correct |
639 ms |
31284 KB |
Output is correct |
43 |
Correct |
213 ms |
14032 KB |
Output is correct |
44 |
Correct |
205 ms |
14040 KB |
Output is correct |
45 |
Correct |
577 ms |
25112 KB |
Output is correct |
46 |
Correct |
603 ms |
24860 KB |
Output is correct |
47 |
Correct |
653 ms |
26684 KB |
Output is correct |
48 |
Correct |
188 ms |
13412 KB |
Output is correct |
49 |
Correct |
586 ms |
29372 KB |
Output is correct |
50 |
Correct |
560 ms |
25148 KB |
Output is correct |
51 |
Correct |
611 ms |
25100 KB |
Output is correct |