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Submission #1016283

# Submission time Handle Problem Language Result Execution time Memory
1016283 2024-07-07T16:38:00 Z Aiperiii Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 784 ms 5724 KB 
#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
const int N=5e4+5;
vector <pair <pair <int,int> ,int> > g[205];
int dist[205][205];
int a[N],b[N],c[N],d[N];

priority_queue <pair <int,int> > pq;

/*void djkstra(int n,int tp,int x){
    dis[x][n]=0;
    pq.push({0,n});
    while(!pq.empty()){
        int v=pq.top().ss;
        pq.pop();
        for(auto to : g[tp][v]){
            if(dis[x][to.ff.ff]>dis[x][v]+to.ff.ss){
                dis[x][to.ff.ff]=dis[x][v]+to.ff.ss;
                p[x][to.ff.ff]=to.ss;
                pq.push({dis[x][to.ff.ff],to.ff.ff});
            }
        }
    }
}*/

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            dist[i][j]=2e9;
        }
        dist[i][i]=0;
    }
    for(int i=1;i<=m;i++){
        cin>>a[i]>>b[i]>>c[i]>>d[i];
        dist[a[i]][b[i]]=min(dist[a[i]][b[i]],c[i]);
        g[a[i]].pb({{b[i],c[i]},i});
        
    }
    for(int k=1;k<=n;k++){
        for(int i=1;i<=n;i++){
            for(int j=1;j<=n;j++){
                dist[i][j]=min(dist[i][j],dist[i][k]+dist[k][j]);
            }
        }
    }
    
    int mn=2e9;
    mn=min(dist[1][n]+dist[n][1],mn);
    
    for(int i=1;i<=m;i++){
        int new1n=min(dist[1][n],dist[1][b[i]]+dist[a[i]][n]+c[i]);
        int newn1=min(dist[n][1],dist[n][b[i]]+dist[a[i]][1]+c[i]);
        if(new1n+newn1+d[i]>=mn)continue;
        
        vector <int> dis(n+1,2e9);
        dis[1]=0;
        pq.push({0,1});
        while(!pq.empty()){
            int v=pq.top().ss;
            pq.pop();
            if(v==b[i]){
                if(dis[a[i]]>dis[b[i]]+c[i]){
                    dis[a[i]]=dis[b[i]]+c[i];
                    pq.push({dis[a[i]],a[i]});
                }
            }
            for(auto to : g[v]){
                if(to.ss==i)continue;
                if(dis[to.ff.ff]>dis[v]+to.ff.ss){
                    dis[to.ff.ff]=dis[v]+to.ff.ss;
                    pq.push({dis[to.ff.ff],to.ff.ff});
                }
            }
        }
        if(dis[n]!=2e9){
            int ans=dis[n];
            for(int j=1;j<=n;j++){
                dis[j]=2e9;
            }
            dis[n]=0;
            pq.push({0,n});
            while(!pq.empty()){
                int v=pq.top().ss;
                pq.pop();
                if(v==b[i]){
                    if(dis[a[i]]>dis[b[i]]+c[i]){
                        dis[a[i]]=dis[b[i]]+c[i];
                        pq.push({dis[a[i]],a[i]});
                    }
                }
                for(auto to : g[v]){
                    if(to.ss==i)continue;
                    if(dis[to.ff.ff]>dis[v]+to.ff.ss){
                        dis[to.ff.ff]=dis[v]+to.ff.ss;
                        pq.push({dis[to.ff.ff],to.ff.ff});
                    }
                }
            }
            mn=min(mn,ans+dis[1]+d[i]);
        }
        
    }
    if(mn==2e9)mn=-1;
    cout<<mn<<"\n";
    
}
//g[1]-r
//dis[0] 1
//dis[1] 1r
//dis[2] n
//dis[3] nr

/*

*/

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 856 KB Output is correct
2 Correct 8 ms 604 KB Output is correct
3 Correct 11 ms 896 KB Output is correct
4 Correct 8 ms 860 KB Output is correct
5 Correct 1 ms 484 KB Output is correct
6 Correct 8 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 74 ms 892 KB Output is correct
11 Correct 320 ms 888 KB Output is correct
12 Correct 19 ms 860 KB Output is correct
13 Correct 10 ms 900 KB Output is correct
14 Correct 8 ms 892 KB Output is correct
15 Correct 10 ms 860 KB Output is correct
16 Correct 10 ms 860 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 4956 KB Output is correct
2 Correct 24 ms 5212 KB Output is correct
3 Correct 20 ms 5208 KB Output is correct
4 Correct 11 ms 856 KB Output is correct
5 Correct 10 ms 860 KB Output is correct
6 Correct 8 ms 604 KB Output is correct
7 Correct 8 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 64 ms 5288 KB Output is correct
10 Correct 37 ms 5212 KB Output is correct
11 Correct 25 ms 5208 KB Output is correct
12 Correct 22 ms 5464 KB Output is correct
13 Correct 22 ms 5464 KB Output is correct
14 Correct 25 ms 5724 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 860 KB Output is correct
2 Correct 8 ms 820 KB Output is correct
3 Correct 16 ms 3920 KB Output is correct
4 Correct 8 ms 604 KB Output is correct
5 Correct 20 ms 4956 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 21 ms 4864 KB Output is correct
9 Correct 25 ms 4956 KB Output is correct
10 Correct 19 ms 4952 KB Output is correct
11 Correct 19 ms 4696 KB Output is correct
12 Correct 19 ms 4956 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 19 ms 4980 KB Output is correct
20 Correct 25 ms 4952 KB Output is correct
21 Correct 19 ms 4824 KB Output is correct
22 Correct 19 ms 4696 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 856 KB Output is correct
2 Correct 8 ms 604 KB Output is correct
3 Correct 11 ms 896 KB Output is correct
4 Correct 8 ms 860 KB Output is correct
5 Correct 1 ms 484 KB Output is correct
6 Correct 8 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 74 ms 892 KB Output is correct
11 Correct 320 ms 888 KB Output is correct
12 Correct 19 ms 860 KB Output is correct
13 Correct 10 ms 900 KB Output is correct
14 Correct 8 ms 892 KB Output is correct
15 Correct 10 ms 860 KB Output is correct
16 Correct 10 ms 860 KB Output is correct
17 Correct 19 ms 4956 KB Output is correct
18 Correct 24 ms 5212 KB Output is correct
19 Correct 20 ms 5208 KB Output is correct
20 Correct 11 ms 856 KB Output is correct
21 Correct 10 ms 860 KB Output is correct
22 Correct 8 ms 604 KB Output is correct
23 Correct 8 ms 604 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 64 ms 5288 KB Output is correct
26 Correct 37 ms 5212 KB Output is correct
27 Correct 25 ms 5208 KB Output is correct
28 Correct 22 ms 5464 KB Output is correct
29 Correct 22 ms 5464 KB Output is correct
30 Correct 25 ms 5724 KB Output is correct
31 Correct 8 ms 860 KB Output is correct
32 Correct 8 ms 820 KB Output is correct
33 Correct 16 ms 3920 KB Output is correct
34 Correct 8 ms 604 KB Output is correct
35 Correct 20 ms 4956 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 21 ms 4864 KB Output is correct
39 Correct 25 ms 4956 KB Output is correct
40 Correct 19 ms 4952 KB Output is correct
41 Correct 19 ms 4696 KB Output is correct
42 Correct 19 ms 4956 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 19 ms 4980 KB Output is correct
50 Correct 25 ms 4952 KB Output is correct
51 Correct 19 ms 4824 KB Output is correct
52 Correct 19 ms 4696 KB Output is correct
53 Correct 19 ms 4952 KB Output is correct
54 Correct 19 ms 5008 KB Output is correct
55 Correct 19 ms 5212 KB Output is correct
56 Correct 8 ms 860 KB Output is correct
57 Correct 8 ms 860 KB Output is correct
58 Correct 24 ms 4248 KB Output is correct
59 Correct 30 ms 4184 KB Output is correct
60 Correct 38 ms 4188 KB Output is correct
61 Correct 28 ms 4120 KB Output is correct
62 Correct 205 ms 4184 KB Output is correct
63 Correct 355 ms 4188 KB Output is correct
64 Correct 187 ms 4140 KB Output is correct
65 Correct 689 ms 4404 KB Output is correct
66 Correct 784 ms 4404 KB Output is correct
67 Correct 10 ms 3796 KB Output is correct
68 Correct 38 ms 5452 KB Output is correct
69 Correct 41 ms 5448 KB Output is correct
70 Correct 27 ms 5464 KB Output is correct
71 Correct 23 ms 5212 KB Output is correct
72 Correct 21 ms 5212 KB Output is correct
73 Correct 21 ms 5336 KB Output is correct
74 Correct 24 ms 5212 KB Output is correct