oj.uz

Submission #920158

# Submission time Handle Problem Language Result Execution time Memory
920158 2024-02-02T06:55:12 Z vjudge1 Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 446 ms 6632 KB 
    #include "bits/stdc++.h"
    #pragma optimize ("Bismillahirrahmanirrahim")
    using namespace std;
    #define pb push_back
    #define ff first
    #define ss second
    #define endl "\n" 
    #define int long long
    #define double long double
    #define sz(x) ((int)(x).size())
    #define all(x) (x).begin(), (x).end()
    #define rall(x) (x).rbegin(), (x).rend()
    #define what_is(x) cerr << #x << " is " << x << endl;
    //#define m (l+r)/2
    constexpr int N=200005;
    constexpr int MOD=1000000007;
    constexpr int  INF2 = LLONG_MAX;
    constexpr int INF=(int)1e15;
    constexpr int LOG=30;
    typedef pair<int,int> pii;
    typedef tuple<int,int,int> tp;
    typedef priority_queue<pii,vector<pii>,greater<pii>> min_pq;
    typedef priority_queue<pii> max_pq;
    typedef long long ll;
    //to think//
    /*
     * graph approach
     * dp
     * dividing the problem to smaller statements
     * finding the real constraint
     * sqrt decomposition
     * greedy approach
     * pigeonhole principle
     * rewriting the problem/equality 
     * bitwise approaches
     * binary search if monotonic
     * divide and conquer
     * combinatorics
     * inclusion - exclusion
     * think like bfs
    */
     
     
     
    inline int in()
    {
      int x;cin >> x;
      return x;
    }
     
    inline string in2()
    {
      string x;cin >> x;
      return x;
    }
     
    /*
     1- sp route cikar (n^2 dijkstra ile)
     2- sp routetaki her edge için tekrardan dijkstra(n^2) at
     3- sp routetaki edge değilse dist[1][b] + c + d dist[a][n] dene
    */
     
    int n,m;
     
    multiset<array<int,4>> git;
    vector<array<int,4>> edge;
     
    multiset<array<int,3>> v[205];
     
    int dijk(int rt)
    {
      int di[n+2];
      bool vis[n+2];
     
      for(int i=1;i<=n;i++) {di[i]=INF;vis[i]=0;}
     
      di[rt]=0;
     
      for(int i=1;i<=n;i++)
      {
        pii cur={INF,INF};
        for(int j=1;j<=n;j++) if(vis[j]==0) cur=min(cur,{di[j],j});
        if(cur.ff==INF) break;
        vis[cur.ss]=1;
        for(array<int,3> x:v[cur.ss]) if(cur.ff+x[1]<di[x[0]]) di[x[0]]=cur.ff+x[1];
      }
      
      if(rt==1) return di[n];
      else return di[1];
    }
     
    void rout(int rt)
    {
      int di[n+1];
      bool vis[n+1];
      for(int i=1;i<=n;i++) {di[i]=INF;vis[i]=0;}
      di[rt]=0;
      
      array<int,3> par[n+1];
     
      for(int i=1;i<=n;i++)
      {
        pii cur={INF,INF};
        for(int j=1;j<=n;j++) if(vis[j]==0) cur=min(cur,{di[j],j});
        if(cur.ff==INF) break;
        vis[cur.ss]=1;
        for(array<int,3> x:v[cur.ss]) 
          if(cur.ff+x[1]<di[x[0]]) 
            {par[x[0]]={cur.ss,x[1],x[2]};di[x[0]]=cur.ff+x[1];}
      }
      
     
      if(rt==1)
      {
        if(vis[n]==0) return;
        int xd=n;
        while(xd!=1)
        {
          git.insert({par[xd][0],xd,par[xd][1],par[xd][2]});
          xd=par[xd][0];
        }
      }
      else
      {
        int xd=1;
        if(vis[1]==0) return;
        while(xd!=n)
        {
          git.insert({par[xd][0],xd,par[xd][1],par[xd][2]});
          xd=par[xd][0];
        }
      }
    }
     
     
    int dist[202][202];
     
    void solve()
    {
      n=in(),m=in();
      for(int i=1;i<=201;i++) for(int j=1;j<=201;j++) dist[i][j]=INF;
      for(int i=1;i<=201;i++) dist[i][i]=0;
      
      for(int i=1;i<=m;i++)
      {
        int a=in(),b=in(),c=in(),d=in();
        edge.pb({a,b,c,d});
        dist[a][b]=min(dist[a][b],c);
        v[a].insert({b,c,d});
      }
      
      rout(1);
      rout(n);
     
      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 ans=dist[1][n]+dist[n][1];
      for(array<int,4> x:edge)
      {
        int gitme=INF;
        int gelme=INF;
        if(git.count(x)==1)
        { 
          v[x[0]].erase(v[x[0]].find({x[1],x[2],x[3]}));
          v[x[1]].insert({x[0],x[2],x[3]});
          gitme=min(gitme,dijk(1));
          gelme=min(gelme,dijk(n));
          v[x[1]].erase(v[x[1]].find({x[0],x[2],x[3]}));
          v[x[0]].insert({x[1],x[2],x[3]});
          ans=min(ans,gitme+gelme+x[3]);
        }
        else
        {
          gitme=min(gitme,dist[1][n]);
          gitme=min(gitme,dist[1][x[1]]+dist[x[0]][n]+x[2]);
          gelme=min(gelme,dist[n][1]);
          gelme=min(gelme,dist[n][x[1]]+x[2]+dist[x[0]][1]);
          ans=min(ans,gitme+gelme+x[3]);
        }
      }
     
      cout << (ans>=INF ? -1 :ans) << endl;
    }
     
    int32_t main(){
       
     
      cin.tie(0); ios::sync_with_stdio(0);
      cout << fixed <<  setprecision(15);
       
      int t=1;//t=in();
     
       for(int i=1;i<=t;i++)
       {
         //cout << "Case #" << i << ": ";
         solve();
       }
     
     return 0;
    }

Compilation message

ho_t4.cpp:2: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    2 |     #pragma optimize ("Bismillahirrahmanirrahim")
      |

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 856 KB Output is correct
2 Correct 7 ms 600 KB Output is correct
3 Correct 9 ms 856 KB Output is correct
4 Correct 10 ms 856 KB Output is correct
5 Correct 1 ms 856 KB Output is correct
6 Correct 7 ms 600 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 15 ms 860 KB Output is correct
11 Correct 40 ms 856 KB Output is correct
12 Correct 33 ms 856 KB Output is correct
13 Correct 8 ms 856 KB Output is correct
14 Correct 9 ms 856 KB Output is correct
15 Correct 9 ms 856 KB Output is correct
16 Correct 9 ms 860 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 6592 KB Output is correct
2 Correct 44 ms 6344 KB Output is correct
3 Correct 43 ms 6592 KB Output is correct
4 Correct 10 ms 856 KB Output is correct
5 Correct 10 ms 856 KB Output is correct
6 Correct 8 ms 856 KB Output is correct
7 Correct 7 ms 600 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 29 ms 6592 KB Output is correct
10 Correct 30 ms 6596 KB Output is correct
11 Correct 44 ms 6592 KB Output is correct
12 Correct 41 ms 6596 KB Output is correct
13 Correct 41 ms 6592 KB Output is correct
14 Correct 40 ms 6604 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 856 KB Output is correct
2 Correct 7 ms 600 KB Output is correct
3 Correct 41 ms 5712 KB Output is correct
4 Correct 7 ms 600 KB Output is correct
5 Correct 37 ms 6364 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 29 ms 6344 KB Output is correct
9 Correct 31 ms 6336 KB Output is correct
10 Correct 35 ms 6348 KB Output is correct
11 Correct 35 ms 6180 KB Output is correct
12 Correct 35 ms 6332 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 0 ms 856 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 36 ms 6348 KB Output is correct
20 Correct 37 ms 6336 KB Output is correct
21 Correct 39 ms 6344 KB Output is correct
22 Correct 36 ms 6336 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 856 KB Output is correct
2 Correct 7 ms 600 KB Output is correct
3 Correct 9 ms 856 KB Output is correct
4 Correct 10 ms 856 KB Output is correct
5 Correct 1 ms 856 KB Output is correct
6 Correct 7 ms 600 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 15 ms 860 KB Output is correct
11 Correct 40 ms 856 KB Output is correct
12 Correct 33 ms 856 KB Output is correct
13 Correct 8 ms 856 KB Output is correct
14 Correct 9 ms 856 KB Output is correct
15 Correct 9 ms 856 KB Output is correct
16 Correct 9 ms 860 KB Output is correct
17 Correct 50 ms 6592 KB Output is correct
18 Correct 44 ms 6344 KB Output is correct
19 Correct 43 ms 6592 KB Output is correct
20 Correct 10 ms 856 KB Output is correct
21 Correct 10 ms 856 KB Output is correct
22 Correct 8 ms 856 KB Output is correct
23 Correct 7 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 29 ms 6592 KB Output is correct
26 Correct 30 ms 6596 KB Output is correct
27 Correct 44 ms 6592 KB Output is correct
28 Correct 41 ms 6596 KB Output is correct
29 Correct 41 ms 6592 KB Output is correct
30 Correct 40 ms 6604 KB Output is correct
31 Correct 12 ms 856 KB Output is correct
32 Correct 7 ms 600 KB Output is correct
33 Correct 41 ms 5712 KB Output is correct
34 Correct 7 ms 600 KB Output is correct
35 Correct 37 ms 6364 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 600 KB Output is correct
38 Correct 29 ms 6344 KB Output is correct
39 Correct 31 ms 6336 KB Output is correct
40 Correct 35 ms 6348 KB Output is correct
41 Correct 35 ms 6180 KB Output is correct
42 Correct 35 ms 6332 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 1 ms 600 KB Output is correct
45 Correct 1 ms 600 KB Output is correct
46 Correct 0 ms 604 KB Output is correct
47 Correct 0 ms 856 KB Output is correct
48 Correct 1 ms 600 KB Output is correct
49 Correct 36 ms 6348 KB Output is correct
50 Correct 37 ms 6336 KB Output is correct
51 Correct 39 ms 6344 KB Output is correct
52 Correct 36 ms 6336 KB Output is correct
53 Correct 47 ms 6336 KB Output is correct
54 Correct 59 ms 6344 KB Output is correct
55 Correct 55 ms 6336 KB Output is correct
56 Correct 9 ms 856 KB Output is correct
57 Correct 9 ms 856 KB Output is correct
58 Correct 58 ms 5704 KB Output is correct
59 Correct 160 ms 5572 KB Output is correct
60 Correct 446 ms 5580 KB Output is correct
61 Correct 174 ms 5580 KB Output is correct
62 Correct 162 ms 5572 KB Output is correct
63 Correct 446 ms 5580 KB Output is correct
64 Correct 61 ms 5580 KB Output is correct
65 Correct 150 ms 5580 KB Output is correct
66 Correct 426 ms 5580 KB Output is correct
67 Correct 22 ms 5580 KB Output is correct
68 Correct 32 ms 6536 KB Output is correct
69 Correct 30 ms 6572 KB Output is correct
70 Correct 49 ms 6604 KB Output is correct
71 Correct 45 ms 6592 KB Output is correct
72 Correct 44 ms 6632 KB Output is correct
73 Correct 45 ms 6600 KB Output is correct
74 Correct 48 ms 6592 KB Output is correct