oj.uz

Submission #922269

# Submission time Handle Problem Language Result Execution time Memory
922269 2024-02-05T10:36:39 Z Aiperiii Dreaming (IOI13_dreaming) C++14
18 / 100
 36 ms 14036 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int NN=1e5+5;
int l[NN],d[NN],p[NN];
vector <int> gr[NN];
vector <pair <int,int> >g[NN];
int find_set(int v){
   if(l[v]==v)return v;
   return l[v]=find_set(l[v]);
}
void union_set(int u,int v){
   u=find_set(u);
   v=find_set(v);
   if(u!=v){
     if(gr[v].size()<gr[u].size())swap(u,v);
     l[u]=v;
     for(auto x : gr[u])gr[v].pb(x);
     gr[u].clear();
   }
}
void bfs(int v){
   queue <int> q;
   q.push(v);
   while(!q.empty()){
      int v=q.front();
      q.pop();
      for(auto to : g[v]){
         if(d[to.ff]==-1){
            p[to.ff]=v;
            d[to.ff]=d[v]+to.ss;
            q.push(to.ff);
         }
      }
   }
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
   for(int i=0;i<N;i++){
      l[i]=i;
      gr[i].pb(i);
   }
   for(int i=0;i<M;i++){
      union_set(A[i],B[i]);
      g[A[i]].pb({B[i],T[i]});
      g[B[i]].pb({A[i],T[i]});
   }
   vector <int> len;
   for(int i=0;i<N;i++)d[i]=-1;
   for(int i=0;i<N;i++){
      if(gr[i].size()!=0){
         d[gr[i][0]]=0;
         bfs(gr[i][0]);
         int mx=0,node=gr[i][0];
         for(auto x : gr[i]){
            if(d[x]>mx){
               mx=d[x];
               node=x;
            }
            d[x]=-1;
            p[x]=0;
         }
         d[node]=0;
         bfs(node);
         mx=0;
         int s=node;
         for(auto x : gr[i]){
            if(d[x]>mx){
               mx=d[x];
               node=x;
            }
         }
         vector <int> path;
         path.pb(node);
         while(node!=s){
            node=p[node];
            path.pb(node);
         }
         int mn=1e9+5;
         for(auto x : path){
            mn=min(max(mx-d[x],d[x]),mn);
         }
         len.pb(mn);
         for(auto x : gr[i]){
            d[x]=-1;
            p[x]=0;
         }
      }
   }
   int ans=0;
   sort(all(len));
   for(auto x : len)ans=max(ans,x);
   if(len.size()>=2)ans=max(ans,L+len[len.size()-1]+len[len.size()-2]);
   if(len.size()>=3)ans=max(ans,2*L+len[len.size()-2]+len[len.size()-3]);
   return ans;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 36 ms 14036 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 6492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 36 ms 14036 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 12632 KB Output is correct
2 Correct 30 ms 12636 KB Output is correct
3 Correct 27 ms 12636 KB Output is correct
4 Correct 26 ms 12636 KB Output is correct
5 Correct 31 ms 12592 KB Output is correct
6 Correct 36 ms 13016 KB Output is correct
7 Correct 34 ms 12892 KB Output is correct
8 Correct 27 ms 12496 KB Output is correct
9 Correct 30 ms 12504 KB Output is correct
10 Correct 33 ms 12760 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 15 ms 10972 KB Output is correct
13 Correct 15 ms 10972 KB Output is correct
14 Correct 16 ms 10972 KB Output is correct
15 Correct 15 ms 10972 KB Output is correct
16 Correct 15 ms 10972 KB Output is correct
17 Correct 20 ms 11324 KB Output is correct
18 Correct 15 ms 10968 KB Output is correct
19 Correct 17 ms 11016 KB Output is correct
20 Correct 2 ms 6488 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 20 ms 11068 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 6492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 36 ms 14036 KB Output isn't correct
2 Halted 0 ms 0 KB -