oj.uz

Submission #924801

# Submission time Handle Problem Language Result Execution time Memory
924801 2024-02-09T17:06:41 Z yeediot Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 781 ms 7616 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define sz(x) (int)(x.size())
#define all(x) x.begin(),x.end()
#define F first
#define S second
#define pb push_back
#ifdef local
void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
struct edge{
    int a,b,c,d;
};
const int mxn=405;
const int inf=1e15;
vector<edge>e;
int from[5][mxn];
int dis[5][mxn];
vector<pii>adj[2][mxn];
vector<pii>adj2[mxn];
bool used[500005];
int n;
void dij(int st,int p,int type){
    for(int i=0;i<mxn;i++){
        dis[p][i]=inf;
        from[p][i]=-1;
    }
    dis[p][st]=0;
    priority_queue<pii,vector<pii>,greater<pii>>pq;
    pq.push({0,st});
    while(sz(pq)){
        auto [dist,v]=pq.top();
        pq.pop();
        if(dist>dis[p][v])continue;
        if(from[p][v]!=-1)used[from[p][v]]=1;
        for(auto [u,id]:adj[type][v]){
            int w=e[id].c;
            if(dist+w<dis[p][u]){
                dis[p][u]=dist+w;
                pq.push({dis[p][u],u});
                from[p][u]=id;
            }
        }
    }
}
int dij2(int st,int ed,int p,int i){
    for(int i=0;i<mxn;i++){
        dis[p][i]=inf;
        from[p][i]=inf;
    }
    dis[p][st]=0;
    priority_queue<pii,vector<pii>,greater<pii>>pq;
    pq.push({0,st});
    while(sz(pq)){
        auto [dist,v]=pq.top();
        pq.pop();
        if(dist>dis[p][v])continue;
        for(auto [u,id]:adj2[v]){
            if(id==i and e[id].a==v)continue;
            int w=e[id].c;
            if(dist+w<dis[p][u]){
                dis[p][u]=dist+w;
                pq.push({dis[p][u],u});
            }
        }
    }
    return dis[p][ed];
}
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    setio();
    int m;
    cin>>n>>m;
    for(int i=0;i<m;i++){
        int a,b,c,d;
        cin>>a>>b>>c>>d;
        e.pb({a,b,c,d});
        adj[0][a].pb({b,i});
        adj2[a].pb({b,i});
        adj[1][b].pb({a,i});
    }
    dij(1,0,0);
    dij(1,1,1);
    dij(n,2,0);
    dij(n,3,1);
    int ans=dis[0][n]+dis[2][1];
    for(int i=0;i<m;i++){
        auto [a,b,c,d]=e[i];
        if(used[i]){
            e[i].c+=d;
            adj2[b].pb({a,i});
            ans=min(ans,dij2(1,n,4,i)+dij2(n,1,4,i));
            adj2[b].pop_back();
            e[i].c-=d;
        }
        else{
            ans=min(ans,min(dis[0][n],dis[0][b]+c+dis[3][a])+min(dis[2][1],dis[2][b]+dis[1][a]+c)+d);
        }
    }
    if(ans>=(int)1e15){
        cout<<-1<<'\n';
        return 0;
    }
    cout<<ans<<'\n';
}
/*
*/

Compilation message

ho_t4.cpp: In function 'void dij(long long int, long long int, long long int)':
ho_t4.cpp:38:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |         auto [dist,v]=pq.top();
      |              ^
ho_t4.cpp:42:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   42 |         for(auto [u,id]:adj[type][v]){
      |                  ^
ho_t4.cpp: In function 'long long int dij2(long long int, long long int, long long int, long long int)':
ho_t4.cpp:61:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   61 |         auto [dist,v]=pq.top();
      |              ^
ho_t4.cpp:64:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   64 |         for(auto [u,id]:adj2[v]){
      |                  ^
ho_t4.cpp: In function 'int main()':
ho_t4.cpp:95:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   95 |         auto [a,b,c,d]=e[i];
      |              ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 600 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 18 ms 644 KB Output is correct
4 Correct 22 ms 604 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 1 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 604 KB Output is correct
10 Correct 14 ms 652 KB Output is correct
11 Correct 17 ms 604 KB Output is correct
12 Correct 20 ms 648 KB Output is correct
13 Correct 4 ms 604 KB Output is correct
14 Correct 10 ms 512 KB Output is correct
15 Correct 9 ms 604 KB Output is correct
16 Correct 10 ms 604 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 5836 KB Output is correct
2 Correct 197 ms 6120 KB Output is correct
3 Correct 195 ms 5832 KB Output is correct
4 Correct 16 ms 600 KB Output is correct
5 Correct 7 ms 856 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 352 KB Output is correct
9 Correct 70 ms 7244 KB Output is correct
10 Correct 53 ms 7116 KB Output is correct
11 Correct 134 ms 6988 KB Output is correct
12 Correct 122 ms 7152 KB Output is correct
13 Correct 115 ms 7112 KB Output is correct
14 Correct 129 ms 7616 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 604 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 154 ms 5072 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 191 ms 5888 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 61 ms 5964 KB Output is correct
9 Correct 66 ms 6604 KB Output is correct
10 Correct 111 ms 6604 KB Output is correct
11 Correct 125 ms 7096 KB Output is correct
12 Correct 129 ms 7108 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 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 376 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 128 ms 7072 KB Output is correct
20 Correct 123 ms 6796 KB Output is correct
21 Correct 119 ms 6820 KB Output is correct
22 Correct 121 ms 6856 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 600 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 18 ms 644 KB Output is correct
4 Correct 22 ms 604 KB Output is correct
5 Correct 2 ms 600 KB Output is correct
6 Correct 1 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 604 KB Output is correct
10 Correct 14 ms 652 KB Output is correct
11 Correct 17 ms 604 KB Output is correct
12 Correct 20 ms 648 KB Output is correct
13 Correct 4 ms 604 KB Output is correct
14 Correct 10 ms 512 KB Output is correct
15 Correct 9 ms 604 KB Output is correct
16 Correct 10 ms 604 KB Output is correct
17 Correct 185 ms 5836 KB Output is correct
18 Correct 197 ms 6120 KB Output is correct
19 Correct 195 ms 5832 KB Output is correct
20 Correct 16 ms 600 KB Output is correct
21 Correct 7 ms 856 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 352 KB Output is correct
25 Correct 70 ms 7244 KB Output is correct
26 Correct 53 ms 7116 KB Output is correct
27 Correct 134 ms 6988 KB Output is correct
28 Correct 122 ms 7152 KB Output is correct
29 Correct 115 ms 7112 KB Output is correct
30 Correct 129 ms 7616 KB Output is correct
31 Correct 9 ms 604 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 154 ms 5072 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 191 ms 5888 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 61 ms 5964 KB Output is correct
39 Correct 66 ms 6604 KB Output is correct
40 Correct 111 ms 6604 KB Output is correct
41 Correct 125 ms 7096 KB Output is correct
42 Correct 129 ms 7108 KB Output is correct
43 Correct 1 ms 344 KB Output is correct
44 Correct 0 ms 344 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 376 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 128 ms 7072 KB Output is correct
50 Correct 123 ms 6796 KB Output is correct
51 Correct 119 ms 6820 KB Output is correct
52 Correct 121 ms 6856 KB Output is correct
53 Correct 207 ms 6824 KB Output is correct
54 Correct 213 ms 6856 KB Output is correct
55 Correct 192 ms 6736 KB Output is correct
56 Correct 22 ms 672 KB Output is correct
57 Correct 19 ms 604 KB Output is correct
58 Correct 88 ms 5836 KB Output is correct
59 Correct 103 ms 5840 KB Output is correct
60 Correct 159 ms 5836 KB Output is correct
61 Correct 90 ms 5836 KB Output is correct
62 Correct 98 ms 5840 KB Output is correct
63 Correct 136 ms 5832 KB Output is correct
64 Correct 558 ms 6036 KB Output is correct
65 Correct 592 ms 6092 KB Output is correct
66 Correct 781 ms 6048 KB Output is correct
67 Correct 14 ms 5832 KB Output is correct
68 Correct 65 ms 7100 KB Output is correct
69 Correct 58 ms 7116 KB Output is correct
70 Correct 140 ms 7060 KB Output is correct
71 Correct 135 ms 6904 KB Output is correct
72 Correct 141 ms 7116 KB Output is correct
73 Correct 150 ms 7296 KB Output is correct
74 Correct 136 ms 7112 KB Output is correct