oj.uz

Submission #747128

# Submission time Handle Problem Language Result Execution time Memory
747128 2023-05-23T16:32:04 Z 1075508020060209tc Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 923 ms 5016 KB 
#include <bits/stdc++.h>
using namespace std;

int n;int m;
int uar[50010];int var[50010];long long war[50010];long long dar[50010];
long long dis[210];
long long rdis[210];
int vis[210];
long long odis[210];
long long ordis[210];
vector<pair<int,long long>>e[210];
long long 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;
        long long 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;
        long long 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];
 
long long dis1[210];int frm[210];
long long rdis1[210];int frmn[210];
 
long long disn[210];
long long rdisn[210];
 
long long 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];
    }
    }
 
    long long 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];
            long long 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: 'int' and 'std::vector<std::pair<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: 'int' and 'std::vector<std::pair<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: 'int' and 'std::vector<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: 'int' and 'std::vector<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 10 ms 724 KB Output is correct
2 Correct 9 ms 724 KB Output is correct
3 Correct 11 ms 748 KB Output is correct
4 Correct 10 ms 724 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 9 ms 720 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 25 ms 788 KB Output is correct
11 Correct 30 ms 852 KB Output is correct
12 Correct 30 ms 852 KB Output is correct
13 Correct 10 ms 756 KB Output is correct
14 Correct 10 ms 852 KB Output is correct
15 Correct 10 ms 724 KB Output is correct
16 Correct 9 ms 752 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 3716 KB Output is correct
2 Correct 34 ms 3748 KB Output is correct
3 Correct 34 ms 3860 KB Output is correct
4 Correct 9 ms 852 KB Output is correct
5 Correct 10 ms 744 KB Output is correct
6 Correct 9 ms 724 KB Output is correct
7 Correct 9 ms 724 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 30 ms 3776 KB Output is correct
10 Correct 26 ms 3712 KB Output is correct
11 Correct 35 ms 3788 KB Output is correct
12 Correct 33 ms 3848 KB Output is correct
13 Correct 33 ms 3796 KB Output is correct
14 Correct 33 ms 4052 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 748 KB Output is correct
2 Correct 8 ms 724 KB Output is correct
3 Correct 25 ms 2900 KB Output is correct
4 Correct 9 ms 724 KB Output is correct
5 Correct 31 ms 3688 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 29 ms 3780 KB Output is correct
9 Correct 25 ms 3724 KB Output is correct
10 Correct 28 ms 3792 KB Output is correct
11 Correct 27 ms 3692 KB Output is correct
12 Correct 27 ms 3784 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 28 ms 3864 KB Output is correct
20 Correct 28 ms 3792 KB Output is correct
21 Correct 31 ms 3696 KB Output is correct
22 Correct 28 ms 3660 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 724 KB Output is correct
2 Correct 9 ms 724 KB Output is correct
3 Correct 11 ms 748 KB Output is correct
4 Correct 10 ms 724 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 9 ms 720 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 25 ms 788 KB Output is correct
11 Correct 30 ms 852 KB Output is correct
12 Correct 30 ms 852 KB Output is correct
13 Correct 10 ms 756 KB Output is correct
14 Correct 10 ms 852 KB Output is correct
15 Correct 10 ms 724 KB Output is correct
16 Correct 9 ms 752 KB Output is correct
17 Correct 33 ms 3716 KB Output is correct
18 Correct 34 ms 3748 KB Output is correct
19 Correct 34 ms 3860 KB Output is correct
20 Correct 9 ms 852 KB Output is correct
21 Correct 10 ms 744 KB Output is correct
22 Correct 9 ms 724 KB Output is correct
23 Correct 9 ms 724 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 30 ms 3776 KB Output is correct
26 Correct 26 ms 3712 KB Output is correct
27 Correct 35 ms 3788 KB Output is correct
28 Correct 33 ms 3848 KB Output is correct
29 Correct 33 ms 3796 KB Output is correct
30 Correct 33 ms 4052 KB Output is correct
31 Correct 9 ms 748 KB Output is correct
32 Correct 8 ms 724 KB Output is correct
33 Correct 25 ms 2900 KB Output is correct
34 Correct 9 ms 724 KB Output is correct
35 Correct 31 ms 3688 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 29 ms 3780 KB Output is correct
39 Correct 25 ms 3724 KB Output is correct
40 Correct 28 ms 3792 KB Output is correct
41 Correct 27 ms 3692 KB Output is correct
42 Correct 27 ms 3784 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 0 ms 340 KB Output is correct
49 Correct 28 ms 3864 KB Output is correct
50 Correct 28 ms 3792 KB Output is correct
51 Correct 31 ms 3696 KB Output is correct
52 Correct 28 ms 3660 KB Output is correct
53 Correct 36 ms 3696 KB Output is correct
54 Correct 37 ms 3792 KB Output is correct
55 Correct 35 ms 3700 KB Output is correct
56 Correct 10 ms 724 KB Output is correct
57 Correct 10 ms 724 KB Output is correct
58 Correct 156 ms 3180 KB Output is correct
59 Correct 184 ms 3152 KB Output is correct
60 Correct 247 ms 3160 KB Output is correct
61 Correct 157 ms 3172 KB Output is correct
62 Correct 184 ms 3276 KB Output is correct
63 Correct 246 ms 3168 KB Output is correct
64 Correct 632 ms 3636 KB Output is correct
65 Correct 679 ms 3680 KB Output is correct
66 Correct 923 ms 3656 KB Output is correct
67 Correct 14 ms 3660 KB Output is correct
68 Correct 28 ms 4940 KB Output is correct
69 Correct 28 ms 4852 KB Output is correct
70 Correct 36 ms 4964 KB Output is correct
71 Correct 34 ms 4940 KB Output is correct
72 Correct 33 ms 4904 KB Output is correct
73 Correct 38 ms 5016 KB Output is correct
74 Correct 39 ms 4988 KB Output is correct