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Submission #748553

# Submission time Handle Problem Language Result Execution time Memory
748553 2023-05-26T13:03:33 Z Pacybwoah Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 799 ms 7084 KB 
#pragma GCC optimize("O3","unroll-loops","Ofast")
#include<iostream>
#include<vector>
#include<queue>
#include<set>
#define ll long long
using namespace std;
int n,m;
vector<bool> crit;
vector<pair<pair<int,int>,pair<ll,ll>>> edges;
void dijk(vector<vector<pair<pair<int,int>,pair<ll,ll>>>> &g,vector<ll> &dist,int s,int skip,bool flag){
    dist[s]=0;
    priority_queue<pair<int,ll>,vector<pair<int,ll>>,greater<pair<int,ll>>> pq;
    vector<int> pre(n+1);
    pq.push(make_pair(0,s));
    while(!pq.empty()){
        auto node=pq.top();
        pq.pop();
        if(dist[node.second]<node.first) continue;
        for(auto x:g[node.second]){
            if(x.first.second==skip) continue;
            if(dist[x.first.first]>dist[node.second]+x.second.first){
                if(flag) pre[x.first.first]=x.first.second;
                dist[x.first.first]=dist[node.second]+x.second.first;
                pq.push(make_pair(dist[x.first.first],x.first.first));
            }
        }
        if(skip!=-1&&edges[skip].first.second==node.second){
            if(dist[edges[skip].first.first]>dist[node.second]+edges[skip].second.first){
                dist[edges[skip].first.first]=dist[node.second]+edges[skip].second.first;
                pq.push(make_pair(dist[edges[skip].first.first],edges[skip].first.first));
            }
        }
    }
    if(flag){
        for(int i=1;i<=n;i++){
            if(i==s) continue;
            crit[pre[i]]=1;
        }
    }
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll a,b,c,d;
    cin>>n>>m;
    crit.resize(m);
    vector<vector<pair<pair<int,int>,pair<ll,ll>>>> graph(n+1),hparg(n+1);
    for(int i=0;i<m;i++){
        cin>>a>>b>>c>>d;
        edges.push_back(make_pair(make_pair(a,b),make_pair(c,d)));
        graph[a].push_back(make_pair(make_pair(b,i),make_pair(c,d)));
        hparg[b].push_back(make_pair(make_pair(a,i),make_pair(c,d)));
    }
    vector<ll> from1(n+1,1e18),fromn(n+1,1e18),to1(n+1,1e18),ton(n+1,1e18);
    dijk(graph,from1,1,-1,1);
    dijk(graph,fromn,n,-1,1);
    dijk(hparg,to1,1,-1,1);
    dijk(hparg,ton,n,-1,1);
    ll ans=from1[n]+fromn[1];
    for(int i=0;i<m;i++){
        if(crit[i]){
            vector<ll> tmp1(n+1,1e18),tmp2(n+1,1e18);
            dijk(graph,tmp1,1,i,0);
            dijk(graph,tmp2,n,i,0);
            ans=min(ans,tmp1[n]+tmp2[1]+edges[i].second.second);
        }
        else{
            ans=min(ans,min(from1[n],from1[edges[i].first.second]+edges[i].second.first+ton[edges[i].first.first])+min(fromn[1],fromn[edges[i].first.second]+edges[i].second.first+to1[edges[i].first.first])+edges[i].second.second);
        }
    }
    if(ans>=1e18) cout<<-1;
    else cout<<ans;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 20 ms 472 KB Output is correct
4 Correct 26 ms 476 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 17 ms 468 KB Output is correct
11 Correct 21 ms 468 KB Output is correct
12 Correct 19 ms 468 KB Output is correct
13 Correct 6 ms 468 KB Output is correct
14 Correct 13 ms 472 KB Output is correct
15 Correct 12 ms 468 KB Output is correct
16 Correct 12 ms 460 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 161 ms 6488 KB Output is correct
2 Correct 160 ms 6112 KB Output is correct
3 Correct 153 ms 6648 KB Output is correct
4 Correct 21 ms 468 KB Output is correct
5 Correct 9 ms 456 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 63 ms 6412 KB Output is correct
10 Correct 53 ms 6244 KB Output is correct
11 Correct 113 ms 6368 KB Output is correct
12 Correct 106 ms 6376 KB Output is correct
13 Correct 102 ms 6144 KB Output is correct
14 Correct 92 ms 7084 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 468 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 127 ms 5240 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 131 ms 6136 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 50 ms 6236 KB Output is correct
9 Correct 53 ms 6152 KB Output is correct
10 Correct 92 ms 5888 KB Output is correct
11 Correct 87 ms 6020 KB Output is correct
12 Correct 94 ms 6028 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 92 ms 6268 KB Output is correct
20 Correct 86 ms 5948 KB Output is correct
21 Correct 89 ms 6292 KB Output is correct
22 Correct 94 ms 5916 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 20 ms 472 KB Output is correct
4 Correct 26 ms 476 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 17 ms 468 KB Output is correct
11 Correct 21 ms 468 KB Output is correct
12 Correct 19 ms 468 KB Output is correct
13 Correct 6 ms 468 KB Output is correct
14 Correct 13 ms 472 KB Output is correct
15 Correct 12 ms 468 KB Output is correct
16 Correct 12 ms 460 KB Output is correct
17 Correct 161 ms 6488 KB Output is correct
18 Correct 160 ms 6112 KB Output is correct
19 Correct 153 ms 6648 KB Output is correct
20 Correct 21 ms 468 KB Output is correct
21 Correct 9 ms 456 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 63 ms 6412 KB Output is correct
26 Correct 53 ms 6244 KB Output is correct
27 Correct 113 ms 6368 KB Output is correct
28 Correct 106 ms 6376 KB Output is correct
29 Correct 102 ms 6144 KB Output is correct
30 Correct 92 ms 7084 KB Output is correct
31 Correct 14 ms 468 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 127 ms 5240 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 131 ms 6136 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 320 KB Output is correct
38 Correct 50 ms 6236 KB Output is correct
39 Correct 53 ms 6152 KB Output is correct
40 Correct 92 ms 5888 KB Output is correct
41 Correct 87 ms 6020 KB Output is correct
42 Correct 94 ms 6028 KB Output is correct
43 Correct 1 ms 316 KB Output is correct
44 Correct 1 ms 316 KB Output is correct
45 Correct 1 ms 212 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 320 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 92 ms 6268 KB Output is correct
50 Correct 86 ms 5948 KB Output is correct
51 Correct 89 ms 6292 KB Output is correct
52 Correct 94 ms 5916 KB Output is correct
53 Correct 182 ms 5904 KB Output is correct
54 Correct 180 ms 6344 KB Output is correct
55 Correct 166 ms 6104 KB Output is correct
56 Correct 24 ms 516 KB Output is correct
57 Correct 23 ms 400 KB Output is correct
58 Correct 77 ms 5388 KB Output is correct
59 Correct 93 ms 5384 KB Output is correct
60 Correct 123 ms 5432 KB Output is correct
61 Correct 73 ms 5388 KB Output is correct
62 Correct 87 ms 5380 KB Output is correct
63 Correct 118 ms 5376 KB Output is correct
64 Correct 573 ms 5548 KB Output is correct
65 Correct 623 ms 5388 KB Output is correct
66 Correct 799 ms 5616 KB Output is correct
67 Correct 16 ms 4348 KB Output is correct
68 Correct 57 ms 6376 KB Output is correct
69 Correct 52 ms 6476 KB Output is correct
70 Correct 112 ms 6472 KB Output is correct
71 Correct 112 ms 6460 KB Output is correct
72 Correct 117 ms 6268 KB Output is correct
73 Correct 119 ms 6396 KB Output is correct
74 Correct 111 ms 6144 KB Output is correct