#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pli pair<ll, int>
#define fi first
#define se second
const int mxN=1e5;
int n, m, s, t, u, v;
vector<pli> adj[mxN];
ll du[mxN], dv[mxN], ds[mxN], dt[mxN], dp[mxN], ans;
priority_queue<pli, vector<pli>, greater<pli>> pq;
void dijkstra(int s, ll dist[mxN]) {
memset(dist, 0x3F, 8*n);
dist[s]=0;
pq.push({0, s});
while(!pq.empty()) {
pli p=pq.top();
pq.pop();
int u=p.se;
if(p.fi>dist[u])
continue;
for(pli e : adj[u]) {
int v=e.se;
if(dist[u]+e.fi<dist[v]) {
dist[v]=dist[u]+e.fi;
pq.push({dist[v], v});
}
}
}
}
ll cdp(int u, bool a) {
if(dp[u]==-1) {
if(ds[u]+dt[u]==ds[t]) {
dp[u]=dv[u];
for(pli e : adj[u])
if(a?ds[u]+e.fi==ds[e.se]:dt[u]+e.fi==dt[e.se])
dp[u]=min(cdp(e.se, a), dp[u]);
ans=min(du[u]+dp[u], ans);
} else
dp[u]=1e18;
}
return dp[u];
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m >> s >> t >> u >> v, --s, --t, --u, --v;
while(m--) {
int ui, vi, wi;
cin >> ui >> vi >> wi, --ui, --vi;
adj[ui].push_back({wi, vi});
adj[vi].push_back({wi, ui});
}
dijkstra(u, du);
dijkstra(v, dv);
dijkstra(s, ds);
dijkstra(t, dt);
ans=du[v];
memset(dp, -1, 8*n);
cdp(t, 0);
memset(dp, -1, 8*n);
cdp(s, 1);
cout << ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
252 ms |
21960 KB |
Output is correct |
2 |
Correct |
275 ms |
21612 KB |
Output is correct |
3 |
Correct |
292 ms |
27208 KB |
Output is correct |
4 |
Correct |
240 ms |
22072 KB |
Output is correct |
5 |
Correct |
270 ms |
21292 KB |
Output is correct |
6 |
Correct |
259 ms |
21984 KB |
Output is correct |
7 |
Correct |
272 ms |
21732 KB |
Output is correct |
8 |
Correct |
274 ms |
21652 KB |
Output is correct |
9 |
Correct |
249 ms |
22200 KB |
Output is correct |
10 |
Correct |
211 ms |
22100 KB |
Output is correct |
11 |
Correct |
112 ms |
17108 KB |
Output is correct |
12 |
Correct |
260 ms |
22232 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
282 ms |
23912 KB |
Output is correct |
2 |
Correct |
296 ms |
24020 KB |
Output is correct |
3 |
Correct |
272 ms |
23400 KB |
Output is correct |
4 |
Correct |
285 ms |
23844 KB |
Output is correct |
5 |
Correct |
282 ms |
24380 KB |
Output is correct |
6 |
Correct |
272 ms |
26392 KB |
Output is correct |
7 |
Correct |
314 ms |
26560 KB |
Output is correct |
8 |
Correct |
281 ms |
23916 KB |
Output is correct |
9 |
Correct |
290 ms |
24376 KB |
Output is correct |
10 |
Correct |
310 ms |
23696 KB |
Output is correct |
11 |
Correct |
129 ms |
18780 KB |
Output is correct |
12 |
Correct |
297 ms |
26768 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
8 ms |
4428 KB |
Output is correct |
2 |
Correct |
2 ms |
2636 KB |
Output is correct |
3 |
Correct |
2 ms |
2636 KB |
Output is correct |
4 |
Correct |
14 ms |
6092 KB |
Output is correct |
5 |
Correct |
9 ms |
4332 KB |
Output is correct |
6 |
Correct |
2 ms |
2764 KB |
Output is correct |
7 |
Correct |
2 ms |
2764 KB |
Output is correct |
8 |
Correct |
3 ms |
2892 KB |
Output is correct |
9 |
Correct |
2 ms |
2764 KB |
Output is correct |
10 |
Correct |
8 ms |
4348 KB |
Output is correct |
11 |
Correct |
2 ms |
2636 KB |
Output is correct |
12 |
Correct |
2 ms |
2636 KB |
Output is correct |
13 |
Correct |
2 ms |
2684 KB |
Output is correct |
14 |
Correct |
2 ms |
2764 KB |
Output is correct |
15 |
Correct |
2 ms |
2764 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
252 ms |
21960 KB |
Output is correct |
2 |
Correct |
275 ms |
21612 KB |
Output is correct |
3 |
Correct |
292 ms |
27208 KB |
Output is correct |
4 |
Correct |
240 ms |
22072 KB |
Output is correct |
5 |
Correct |
270 ms |
21292 KB |
Output is correct |
6 |
Correct |
259 ms |
21984 KB |
Output is correct |
7 |
Correct |
272 ms |
21732 KB |
Output is correct |
8 |
Correct |
274 ms |
21652 KB |
Output is correct |
9 |
Correct |
249 ms |
22200 KB |
Output is correct |
10 |
Correct |
211 ms |
22100 KB |
Output is correct |
11 |
Correct |
112 ms |
17108 KB |
Output is correct |
12 |
Correct |
260 ms |
22232 KB |
Output is correct |
13 |
Correct |
282 ms |
23912 KB |
Output is correct |
14 |
Correct |
296 ms |
24020 KB |
Output is correct |
15 |
Correct |
272 ms |
23400 KB |
Output is correct |
16 |
Correct |
285 ms |
23844 KB |
Output is correct |
17 |
Correct |
282 ms |
24380 KB |
Output is correct |
18 |
Correct |
272 ms |
26392 KB |
Output is correct |
19 |
Correct |
314 ms |
26560 KB |
Output is correct |
20 |
Correct |
281 ms |
23916 KB |
Output is correct |
21 |
Correct |
290 ms |
24376 KB |
Output is correct |
22 |
Correct |
310 ms |
23696 KB |
Output is correct |
23 |
Correct |
129 ms |
18780 KB |
Output is correct |
24 |
Correct |
297 ms |
26768 KB |
Output is correct |
25 |
Correct |
8 ms |
4428 KB |
Output is correct |
26 |
Correct |
2 ms |
2636 KB |
Output is correct |
27 |
Correct |
2 ms |
2636 KB |
Output is correct |
28 |
Correct |
14 ms |
6092 KB |
Output is correct |
29 |
Correct |
9 ms |
4332 KB |
Output is correct |
30 |
Correct |
2 ms |
2764 KB |
Output is correct |
31 |
Correct |
2 ms |
2764 KB |
Output is correct |
32 |
Correct |
3 ms |
2892 KB |
Output is correct |
33 |
Correct |
2 ms |
2764 KB |
Output is correct |
34 |
Correct |
8 ms |
4348 KB |
Output is correct |
35 |
Correct |
2 ms |
2636 KB |
Output is correct |
36 |
Correct |
2 ms |
2636 KB |
Output is correct |
37 |
Correct |
2 ms |
2684 KB |
Output is correct |
38 |
Correct |
2 ms |
2764 KB |
Output is correct |
39 |
Correct |
2 ms |
2764 KB |
Output is correct |
40 |
Correct |
233 ms |
21944 KB |
Output is correct |
41 |
Correct |
255 ms |
22072 KB |
Output is correct |
42 |
Correct |
254 ms |
22208 KB |
Output is correct |
43 |
Correct |
126 ms |
17768 KB |
Output is correct |
44 |
Correct |
121 ms |
17788 KB |
Output is correct |
45 |
Correct |
281 ms |
21032 KB |
Output is correct |
46 |
Correct |
255 ms |
20712 KB |
Output is correct |
47 |
Correct |
267 ms |
21968 KB |
Output is correct |
48 |
Correct |
137 ms |
14704 KB |
Output is correct |
49 |
Correct |
210 ms |
21548 KB |
Output is correct |
50 |
Correct |
257 ms |
21160 KB |
Output is correct |
51 |
Correct |
266 ms |
21044 KB |
Output is correct |