#include <bits/stdc++.h>
using namespace std;
#define forw(i,a,b) for(ll i=a;i<=b;i++)
#define forb(i,a,b) for(ll i=a;i>=b;i--)
#define pu push
#define pb push_back
#define fi first
#define se second
#define all(a) a.begin(),a.end()
#define minimize(a,b) a=min(a,b)
#define maximize(a,b) a=max(a,b)
typedef long long int ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<ll,pair<ll,ll> > plll;
const int maxN=2e5+5;
const ll oo=1e18;
ll n,m,U,V,s,t,d[maxN][4],dp[maxN][2],father[maxN];
vector <pll> edge[maxN];
vector <ll> new_edge[maxN];
vector <plll> pend;
void dijk(int s, int id)
{
forw(i,1,n) d[i][id]=oo;
d[s][id]=0;
priority_queue<pll, vector <pll> , greater<pll> > p;
p.pu({0,s});
while (p.size())
{
ll u=p.top().se;
ll val=p.top().fi;
p.pop();
if (val>d[u][id]) continue;
for(auto tmp:edge[u])
{
ll v=tmp.se;
ll add=tmp.fi;
if (val+add<d[v][id])
{
d[v][id]=val+add;
p.pu({d[v][id],v});
}
}
}
return;
}
void solve()
{
cin>>n>>m;
cin>>s>>t>>U>>V;
forw(i,1,m)
{
ll u,v,z; cin>>u>>v>>z;
edge[u].pb({z,v});
edge[v].pb({z,u});
pend.pb({z,{u,v}});
}
dijk(s,0);
dijk(t,1);
dijk(U,2);
dijk(V,3);
for(auto tmp:pend)
{
ll val=tmp.fi; ll u=tmp.se.fi; ll v=tmp.se.se;
if (d[u][0]+val+d[v][1]==d[t][0])
{
father[v]++;
new_edge[u].pb(v);
}
if (d[v][0]+val+d[u][1]==d[t][0])
{
father[u]++;
new_edge[v].pb(u);
}
}
ll ans=d[V][2];
forw(i,1,n)
{
dp[i][0]=d[i][2]; // from U
dp[i][1]=d[i][3]; // from V
}
queue<ll> p;
p.pu(s);
while (p.size())
{
ll u=p.front(); p.pop();
ans=min(ans,dp[u][0]+d[u][3]); // to V
ans=min(ans,dp[u][1]+d[u][2]); // to U
for(int v:new_edge[u])
{
dp[v][0]=min(dp[v][0],dp[u][0]);
dp[v][1]=min(dp[v][1],dp[u][1]);
if (--father[v]==0) p.pu(v);
}
}
cout<<ans;
return;
}
int main()
{
ios::sync_with_stdio();
cin.tie(0);
//freopen("bruh.inp","r",stdin);
//freopen("bruh.out","w",stdout);
solve();
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
427 ms |
36528 KB |
Output is correct |
2 |
Correct |
436 ms |
35732 KB |
Output is correct |
3 |
Correct |
439 ms |
37008 KB |
Output is correct |
4 |
Correct |
441 ms |
36440 KB |
Output is correct |
5 |
Correct |
432 ms |
35532 KB |
Output is correct |
6 |
Correct |
410 ms |
36544 KB |
Output is correct |
7 |
Correct |
467 ms |
35584 KB |
Output is correct |
8 |
Correct |
426 ms |
35656 KB |
Output is correct |
9 |
Correct |
407 ms |
35660 KB |
Output is correct |
10 |
Correct |
380 ms |
35564 KB |
Output is correct |
11 |
Correct |
193 ms |
25724 KB |
Output is correct |
12 |
Correct |
454 ms |
35604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
458 ms |
35976 KB |
Output is correct |
2 |
Correct |
426 ms |
35660 KB |
Output is correct |
3 |
Correct |
442 ms |
35640 KB |
Output is correct |
4 |
Correct |
447 ms |
35636 KB |
Output is correct |
5 |
Correct |
440 ms |
35600 KB |
Output is correct |
6 |
Correct |
426 ms |
35932 KB |
Output is correct |
7 |
Correct |
477 ms |
35476 KB |
Output is correct |
8 |
Correct |
463 ms |
35620 KB |
Output is correct |
9 |
Correct |
451 ms |
35660 KB |
Output is correct |
10 |
Correct |
438 ms |
35628 KB |
Output is correct |
11 |
Correct |
196 ms |
26468 KB |
Output is correct |
12 |
Correct |
506 ms |
36092 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
22 ms |
12060 KB |
Output is correct |
2 |
Correct |
6 ms |
9684 KB |
Output is correct |
3 |
Correct |
5 ms |
9684 KB |
Output is correct |
4 |
Correct |
39 ms |
14256 KB |
Output is correct |
5 |
Correct |
22 ms |
12076 KB |
Output is correct |
6 |
Correct |
7 ms |
9844 KB |
Output is correct |
7 |
Correct |
7 ms |
9940 KB |
Output is correct |
8 |
Correct |
9 ms |
10068 KB |
Output is correct |
9 |
Correct |
6 ms |
9848 KB |
Output is correct |
10 |
Correct |
24 ms |
11940 KB |
Output is correct |
11 |
Correct |
6 ms |
9684 KB |
Output is correct |
12 |
Correct |
6 ms |
9684 KB |
Output is correct |
13 |
Correct |
7 ms |
9708 KB |
Output is correct |
14 |
Correct |
7 ms |
9812 KB |
Output is correct |
15 |
Correct |
7 ms |
9792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
427 ms |
36528 KB |
Output is correct |
2 |
Correct |
436 ms |
35732 KB |
Output is correct |
3 |
Correct |
439 ms |
37008 KB |
Output is correct |
4 |
Correct |
441 ms |
36440 KB |
Output is correct |
5 |
Correct |
432 ms |
35532 KB |
Output is correct |
6 |
Correct |
410 ms |
36544 KB |
Output is correct |
7 |
Correct |
467 ms |
35584 KB |
Output is correct |
8 |
Correct |
426 ms |
35656 KB |
Output is correct |
9 |
Correct |
407 ms |
35660 KB |
Output is correct |
10 |
Correct |
380 ms |
35564 KB |
Output is correct |
11 |
Correct |
193 ms |
25724 KB |
Output is correct |
12 |
Correct |
454 ms |
35604 KB |
Output is correct |
13 |
Correct |
458 ms |
35976 KB |
Output is correct |
14 |
Correct |
426 ms |
35660 KB |
Output is correct |
15 |
Correct |
442 ms |
35640 KB |
Output is correct |
16 |
Correct |
447 ms |
35636 KB |
Output is correct |
17 |
Correct |
440 ms |
35600 KB |
Output is correct |
18 |
Correct |
426 ms |
35932 KB |
Output is correct |
19 |
Correct |
477 ms |
35476 KB |
Output is correct |
20 |
Correct |
463 ms |
35620 KB |
Output is correct |
21 |
Correct |
451 ms |
35660 KB |
Output is correct |
22 |
Correct |
438 ms |
35628 KB |
Output is correct |
23 |
Correct |
196 ms |
26468 KB |
Output is correct |
24 |
Correct |
506 ms |
36092 KB |
Output is correct |
25 |
Correct |
22 ms |
12060 KB |
Output is correct |
26 |
Correct |
6 ms |
9684 KB |
Output is correct |
27 |
Correct |
5 ms |
9684 KB |
Output is correct |
28 |
Correct |
39 ms |
14256 KB |
Output is correct |
29 |
Correct |
22 ms |
12076 KB |
Output is correct |
30 |
Correct |
7 ms |
9844 KB |
Output is correct |
31 |
Correct |
7 ms |
9940 KB |
Output is correct |
32 |
Correct |
9 ms |
10068 KB |
Output is correct |
33 |
Correct |
6 ms |
9848 KB |
Output is correct |
34 |
Correct |
24 ms |
11940 KB |
Output is correct |
35 |
Correct |
6 ms |
9684 KB |
Output is correct |
36 |
Correct |
6 ms |
9684 KB |
Output is correct |
37 |
Correct |
7 ms |
9708 KB |
Output is correct |
38 |
Correct |
7 ms |
9812 KB |
Output is correct |
39 |
Correct |
7 ms |
9792 KB |
Output is correct |
40 |
Correct |
383 ms |
36376 KB |
Output is correct |
41 |
Correct |
427 ms |
35548 KB |
Output is correct |
42 |
Correct |
460 ms |
35636 KB |
Output is correct |
43 |
Correct |
197 ms |
27596 KB |
Output is correct |
44 |
Correct |
216 ms |
27732 KB |
Output is correct |
45 |
Correct |
414 ms |
36588 KB |
Output is correct |
46 |
Correct |
397 ms |
36364 KB |
Output is correct |
47 |
Correct |
397 ms |
36700 KB |
Output is correct |
48 |
Correct |
234 ms |
27080 KB |
Output is correct |
49 |
Correct |
365 ms |
36008 KB |
Output is correct |
50 |
Correct |
411 ms |
35724 KB |
Output is correct |
51 |
Correct |
472 ms |
36692 KB |
Output is correct |