oj.uz

Submission #747119

# Submission time Handle Problem Language Result Execution time Memory
747119 2023-05-23T16:09:40 Z 1075508020060209tc Olympic Bus (JOI20_ho_t4) C++14
37 / 100
 1000 ms 6312 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
int n;int m;
int uar[50010];int var[50010];int war[50010];int dar[50010];
int dis[210];
int rdis[210];
int vis[210];
int odis[210];
int ordis[210];
vector<pair<int,int>>e[210];
int dijkstera(){
for(int i=1;i<=n;i++){
    dis[i]=1e18;
    vis[i]=0;
    rdis[i]=1e18;
    e[i].clear();
}
for(int i=1;i<=m;i++){
    e[uar[i]].push_back({var[i],war[i]});
}

priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>pq;
dis[1]=0;
pq.push({0,1});
while(pq.size()){
    int nw=pq.top().second;
    pq.pop();
    if(vis[nw]){continue;}
    vis[nw]=1;
    for(int i=0;i<e[nw].size();i++){
        int v=e[nw][i].first;
        int w=e[nw][i].second;
        if(dis[v]>dis[nw]+w){
            dis[v]=dis[nw]+w;
            pq.push({dis[v],v});
        }
    }
}


rdis[n]=0;
pq.push({0,n});
while(pq.size()){
    int nw=pq.top().second;
    pq.pop();
    if(vis[nw]==2){continue;}
    vis[nw]=2;
    for(int i=0;i<e[nw].size();i++){
        int v=e[nw][i].first;
        int w=e[nw][i].second;
        if(rdis[v]>rdis[nw]+w){
            rdis[v]=rdis[nw]+w;
            pq.push({rdis[v],v});
        }
    }
}
return dis[n]+rdis[1];
}
vector<int>ee[210];
vector<int>er[210];

int dis1[210];int frm[210];
int rdis1[210];int frmn[210];

int disn[210];
int rdisn[210];

int fdis[210][210];
int isin[50010];
signed main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(0);

    cin>>n>>m;

    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            fdis[i][j]=1e18;
        }
        fdis[i][i]=0;
    }

    for(int i=1;i<=m;i++){
        cin>>uar[i]>>var[i]>>war[i]>>dar[i];
        ee[uar[i]].push_back(i);
        er[var[i]].push_back(i);
        fdis[uar[i]][var[i]]=min(fdis[uar[i]][var[i]],war[i]);
    }
    for(int i=1;i<=n;i++){
        dis1[i]=1e18;
        rdis1[i]=1e18;
        disn[i]=1e18;
        rdisn[i]=1e18;
    }

    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>pq;
    dis1[1]=0;
    pq.push({0,1});
    while(pq.size()){
        int nw=pq.top().second;
        pq.pop();
        if(vis[nw]){continue;}
        vis[nw]=1;
        for(int i=0;i<ee[nw].size();i++){
            int id=ee[nw][i];
            int v=var[id];int w=war[id];
            if(dis1[v]>dis1[nw]+w){
                dis1[v]=dis1[nw]+w;
                frm[v]=id;
                pq.push({dis1[v],v});
            }
        }
    }
    for(int i=1;i<=n;i++){
        vis[i]=0;
    }
    disn[n]=0;
    pq.push({0,n});
    while(pq.size()){
        int nw=pq.top().second;
        pq.pop();
        if(vis[nw]){continue;}
        vis[nw]=1;
        for(int i=0;i<ee[nw].size();i++){
            int id=ee[nw][i];
            int v=var[id];int w=war[id];
            if(disn[v]>disn[nw]+w){
                disn[v]=disn[nw]+w;
                frmn[v]=id;
                pq.push({disn[v],v});
            }
        }
    }


    for(int i=1;i<=n;i++){
        for(int a=1;a<=n;a++){
            for(int b=1;b<=n;b++){
                fdis[a][b]=min(fdis[a][b],fdis[a][i]+fdis[i][b]);
            }
        }
    }
    if(dis1[n]<1e18){
    int nw=n;
    while(nw!=1){
        int id=frm[nw];
        isin[id]=1;
        nw=uar[id];
    }
    }
    if(disn[1]<1e18){
    int nw=1;
    while(nw!=n){
        int id=frmn[nw];
        isin[id]=1;
        nw=uar[id];
    }
    }

    int ans=dijkstera();
//cout<<"hihi\n";
    for(int i=1;i<=m;i++){
   //         cout<<i<<" ";
        if(isin[i]){
            swap(uar[i],var[i]);
            ans=min(ans,dijkstera()+dar[i]);
            swap(uar[i],var[i]);
        }else{
      //  continue;
            int a=uar[i];int b=var[i];
            int cal=min(dis1[n],fdis[1][b]+war[i]+fdis[a][n] )+fdis[n][b]+fdis[a][1]+war[i];
            cal=min(cal,min(disn[1],fdis[n][b]+war[i]+fdis[a][1])+fdis[1][b]+fdis[a][n]+war[i] );
            ans=min(ans,cal+dar[i]);

        }
        //}
    //    cout<<ans<<endl;
    }
    if(ans>=1e18){ans=-1;}
cout<<ans<<endl;



}

Compilation message

ho_t4.cpp: In function 'long long int dijkstera()':
ho_t4.cpp:31:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i=0;i<e[nw].size();i++){
      |                 ~^~~~~~~~~~~~~
ho_t4.cpp:49:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for(int i=0;i<e[nw].size();i++){
      |                 ~^~~~~~~~~~~~~
ho_t4.cpp: In function 'int main()':
ho_t4.cpp:106:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |         for(int i=0;i<ee[nw].size();i++){
      |                     ~^~~~~~~~~~~~~~
ho_t4.cpp:126:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  126 |         for(int i=0;i<ee[nw].size();i++){
      |                     ~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 800 KB Output is correct
2 Correct 9 ms 736 KB Output is correct
3 Correct 11 ms 812 KB Output is correct
4 Correct 11 ms 752 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 10 ms 740 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 32 ms 812 KB Output is correct
11 Correct 34 ms 824 KB Output is correct
12 Correct 30 ms 816 KB Output is correct
13 Correct 11 ms 752 KB Output is correct
14 Correct 14 ms 724 KB Output is correct
15 Correct 13 ms 800 KB Output is correct
16 Correct 13 ms 808 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 5900 KB Output is correct
2 Correct 35 ms 5736 KB Output is correct
3 Correct 36 ms 5948 KB Output is correct
4 Correct 20 ms 880 KB Output is correct
5 Correct 11 ms 748 KB Output is correct
6 Correct 12 ms 756 KB Output is correct
7 Correct 10 ms 748 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 31 ms 5860 KB Output is correct
10 Correct 29 ms 5868 KB Output is correct
11 Correct 42 ms 6048 KB Output is correct
12 Correct 38 ms 5964 KB Output is correct
13 Correct 49 ms 6072 KB Output is correct
14 Correct 51 ms 6312 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 876 KB Output is correct
2 Correct 12 ms 740 KB Output is correct
3 Correct 29 ms 4460 KB Output is correct
4 Correct 10 ms 736 KB Output is correct
5 Correct 43 ms 5632 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 28 ms 5708 KB Output is correct
9 Correct 30 ms 5712 KB Output is correct
10 Correct 34 ms 5676 KB Output is correct
11 Correct 31 ms 5640 KB Output is correct
12 Correct 29 ms 5824 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 2 ms 348 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 30 ms 5840 KB Output is correct
20 Correct 29 ms 5660 KB Output is correct
21 Correct 30 ms 5640 KB Output is correct
22 Correct 29 ms 5624 KB Output is correct

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 800 KB Output is correct
2 Correct 9 ms 736 KB Output is correct
3 Correct 11 ms 812 KB Output is correct
4 Correct 11 ms 752 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 10 ms 740 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 32 ms 812 KB Output is correct
11 Correct 34 ms 824 KB Output is correct
12 Correct 30 ms 816 KB Output is correct
13 Correct 11 ms 752 KB Output is correct
14 Correct 14 ms 724 KB Output is correct
15 Correct 13 ms 800 KB Output is correct
16 Correct 13 ms 808 KB Output is correct
17 Correct 36 ms 5900 KB Output is correct
18 Correct 35 ms 5736 KB Output is correct
19 Correct 36 ms 5948 KB Output is correct
20 Correct 20 ms 880 KB Output is correct
21 Correct 11 ms 748 KB Output is correct
22 Correct 12 ms 756 KB Output is correct
23 Correct 10 ms 748 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 31 ms 5860 KB Output is correct
26 Correct 29 ms 5868 KB Output is correct
27 Correct 42 ms 6048 KB Output is correct
28 Correct 38 ms 5964 KB Output is correct
29 Correct 49 ms 6072 KB Output is correct
30 Correct 51 ms 6312 KB Output is correct
31 Correct 12 ms 876 KB Output is correct
32 Correct 12 ms 740 KB Output is correct
33 Correct 29 ms 4460 KB Output is correct
34 Correct 10 ms 736 KB Output is correct
35 Correct 43 ms 5632 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 28 ms 5708 KB Output is correct
39 Correct 30 ms 5712 KB Output is correct
40 Correct 34 ms 5676 KB Output is correct
41 Correct 31 ms 5640 KB Output is correct
42 Correct 29 ms 5824 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 468 KB Output is correct
45 Correct 2 ms 348 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 30 ms 5840 KB Output is correct
50 Correct 29 ms 5660 KB Output is correct
51 Correct 30 ms 5640 KB Output is correct
52 Correct 29 ms 5624 KB Output is correct
53 Correct 34 ms 5780 KB Output is correct
54 Correct 44 ms 5808 KB Output is correct
55 Correct 48 ms 5816 KB Output is correct
56 Correct 11 ms 848 KB Output is correct
57 Correct 10 ms 724 KB Output is correct
58 Correct 176 ms 4916 KB Output is correct
59 Correct 205 ms 4812 KB Output is correct
60 Correct 258 ms 4896 KB Output is correct
61 Correct 199 ms 4876 KB Output is correct
62 Correct 191 ms 4860 KB Output is correct
63 Correct 281 ms 4912 KB Output is correct
64 Correct 763 ms 5764 KB Output is correct
65 Correct 862 ms 5772 KB Output is correct
66 Execution timed out 1071 ms 5868 KB Time limit exceeded
67 Halted 0 ms 0 KB -