#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
#define F first
#define S second
const int MN = 1e5+5, MM = 2e5+5;
int N, M, i, j, x, y, w, S, T, U, V, ww[MM], nd[4], deg[MN];
vector<pll> adj[MN]; vector<int> dag[MN]; ll dis[4][MN], dp[MN][2], ans;
priority_queue<pll,vector<pll>,greater<pll>> q;
queue<int> Q; pll ed[MM];
inline void dij(int idx){
memset(dis[idx],-1,sizeof(dis[idx]));
int st = nd[idx];
q.push({0, st});
while(q.size()){
pll cur = q.top(); q.pop();
if(dis[idx][cur.S]!=-1) continue;
dis[idx][cur.S] = cur.F;
for(auto v : adj[cur.S]){
if(dis[idx][v.F]!=-1) continue;
q.push({cur.F+v.S,v.F});
}
}
}
int main(){
scanf("%d%d%d%d%d%d",&N,&M,&S,&T,&U,&V);
nd[0]=S, nd[1]=T, nd[2]=U, nd[3]=V;
for(i=1;i<=M;i++){
scanf("%d%d%d",&x,&y,&w);
ed[i] = {x, y}; ww[i] = w;
adj[x].push_back({y, w});
adj[y].push_back({x, w});
}
for(i=0;i<4;i++) dij(i);
for(i=1;i<=M;i++){
x = ed[i].F, y = ed[i].S;
if(dis[0][x]>dis[0][y]) swap(x,y);
if(dis[0][x]+dis[1][y]+ww[i]==dis[0][T]){
dag[y].push_back(x);
deg[x]++;
}
}
ans = 1LL<<60;
for(i=1;i<=N;i++){
if(!deg[i]) Q.push(i);
}
memset(dp,0x3f,sizeof(dp));
while(Q.size()){
x = Q.front(); Q.pop();
for(i=0;i<2;i++) dp[x][i] = min(dp[x][i], dis[i^2][x]);
for(i=0;i<2;i++) ans = min(ans, dp[x][i]+dis[i^3][x]);
for(auto v : dag[x]){
deg[v] --;
if(!deg[v]) Q.push(v);
for(i=0;i<2;i++) dp[v][i] = min(dp[v][i], dp[x][i]);
}
}
printf("%lld\n",ans);
return 0;
}
Compilation message
commuter_pass.cpp: In function 'int main()':
commuter_pass.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
31 | scanf("%d%d%d%d%d%d",&N,&M,&S,&T,&U,&V);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
commuter_pass.cpp:34:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
34 | scanf("%d%d%d",&x,&y,&w);
| ~~~~~^~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
462 ms |
28008 KB |
Output is correct |
2 |
Correct |
451 ms |
29804 KB |
Output is correct |
3 |
Correct |
487 ms |
31008 KB |
Output is correct |
4 |
Correct |
475 ms |
30056 KB |
Output is correct |
5 |
Correct |
441 ms |
30080 KB |
Output is correct |
6 |
Correct |
467 ms |
30180 KB |
Output is correct |
7 |
Correct |
461 ms |
30692 KB |
Output is correct |
8 |
Correct |
476 ms |
30692 KB |
Output is correct |
9 |
Correct |
461 ms |
30316 KB |
Output is correct |
10 |
Correct |
416 ms |
30308 KB |
Output is correct |
11 |
Correct |
189 ms |
20600 KB |
Output is correct |
12 |
Correct |
454 ms |
30184 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
481 ms |
28008 KB |
Output is correct |
2 |
Correct |
449 ms |
29668 KB |
Output is correct |
3 |
Correct |
439 ms |
29544 KB |
Output is correct |
4 |
Correct |
458 ms |
29688 KB |
Output is correct |
5 |
Correct |
452 ms |
29968 KB |
Output is correct |
6 |
Correct |
469 ms |
30948 KB |
Output is correct |
7 |
Correct |
452 ms |
30692 KB |
Output is correct |
8 |
Correct |
452 ms |
29944 KB |
Output is correct |
9 |
Correct |
453 ms |
29928 KB |
Output is correct |
10 |
Correct |
447 ms |
29628 KB |
Output is correct |
11 |
Correct |
194 ms |
21240 KB |
Output is correct |
12 |
Correct |
464 ms |
31204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
31 ms |
11780 KB |
Output is correct |
2 |
Correct |
7 ms |
9728 KB |
Output is correct |
3 |
Correct |
7 ms |
9728 KB |
Output is correct |
4 |
Correct |
56 ms |
13812 KB |
Output is correct |
5 |
Correct |
30 ms |
11900 KB |
Output is correct |
6 |
Correct |
8 ms |
9856 KB |
Output is correct |
7 |
Correct |
9 ms |
9984 KB |
Output is correct |
8 |
Correct |
10 ms |
9984 KB |
Output is correct |
9 |
Correct |
8 ms |
9856 KB |
Output is correct |
10 |
Correct |
30 ms |
11900 KB |
Output is correct |
11 |
Correct |
7 ms |
9728 KB |
Output is correct |
12 |
Correct |
7 ms |
9636 KB |
Output is correct |
13 |
Correct |
7 ms |
9728 KB |
Output is correct |
14 |
Correct |
7 ms |
9856 KB |
Output is correct |
15 |
Correct |
7 ms |
9856 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
462 ms |
28008 KB |
Output is correct |
2 |
Correct |
451 ms |
29804 KB |
Output is correct |
3 |
Correct |
487 ms |
31008 KB |
Output is correct |
4 |
Correct |
475 ms |
30056 KB |
Output is correct |
5 |
Correct |
441 ms |
30080 KB |
Output is correct |
6 |
Correct |
467 ms |
30180 KB |
Output is correct |
7 |
Correct |
461 ms |
30692 KB |
Output is correct |
8 |
Correct |
476 ms |
30692 KB |
Output is correct |
9 |
Correct |
461 ms |
30316 KB |
Output is correct |
10 |
Correct |
416 ms |
30308 KB |
Output is correct |
11 |
Correct |
189 ms |
20600 KB |
Output is correct |
12 |
Correct |
454 ms |
30184 KB |
Output is correct |
13 |
Correct |
481 ms |
28008 KB |
Output is correct |
14 |
Correct |
449 ms |
29668 KB |
Output is correct |
15 |
Correct |
439 ms |
29544 KB |
Output is correct |
16 |
Correct |
458 ms |
29688 KB |
Output is correct |
17 |
Correct |
452 ms |
29968 KB |
Output is correct |
18 |
Correct |
469 ms |
30948 KB |
Output is correct |
19 |
Correct |
452 ms |
30692 KB |
Output is correct |
20 |
Correct |
452 ms |
29944 KB |
Output is correct |
21 |
Correct |
453 ms |
29928 KB |
Output is correct |
22 |
Correct |
447 ms |
29628 KB |
Output is correct |
23 |
Correct |
194 ms |
21240 KB |
Output is correct |
24 |
Correct |
464 ms |
31204 KB |
Output is correct |
25 |
Correct |
31 ms |
11780 KB |
Output is correct |
26 |
Correct |
7 ms |
9728 KB |
Output is correct |
27 |
Correct |
7 ms |
9728 KB |
Output is correct |
28 |
Correct |
56 ms |
13812 KB |
Output is correct |
29 |
Correct |
30 ms |
11900 KB |
Output is correct |
30 |
Correct |
8 ms |
9856 KB |
Output is correct |
31 |
Correct |
9 ms |
9984 KB |
Output is correct |
32 |
Correct |
10 ms |
9984 KB |
Output is correct |
33 |
Correct |
8 ms |
9856 KB |
Output is correct |
34 |
Correct |
30 ms |
11900 KB |
Output is correct |
35 |
Correct |
7 ms |
9728 KB |
Output is correct |
36 |
Correct |
7 ms |
9636 KB |
Output is correct |
37 |
Correct |
7 ms |
9728 KB |
Output is correct |
38 |
Correct |
7 ms |
9856 KB |
Output is correct |
39 |
Correct |
7 ms |
9856 KB |
Output is correct |
40 |
Correct |
450 ms |
29636 KB |
Output is correct |
41 |
Correct |
457 ms |
30180 KB |
Output is correct |
42 |
Correct |
476 ms |
30180 KB |
Output is correct |
43 |
Correct |
206 ms |
22264 KB |
Output is correct |
44 |
Correct |
211 ms |
22264 KB |
Output is correct |
45 |
Correct |
500 ms |
31080 KB |
Output is correct |
46 |
Correct |
502 ms |
30816 KB |
Output is correct |
47 |
Correct |
453 ms |
29996 KB |
Output is correct |
48 |
Correct |
203 ms |
21752 KB |
Output is correct |
49 |
Correct |
453 ms |
29380 KB |
Output is correct |
50 |
Correct |
480 ms |
30700 KB |
Output is correct |
51 |
Correct |
502 ms |
31212 KB |
Output is correct |