oj.uz

Submission #57911

# Submission time Handle Problem Language Result Execution time Memory
57911 2018-07-16T13:50:27 Z Autoratch Dreaming (IOI13_dreaming) C++14
0 / 100
 1000 ms 6904 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
using namespace std;

vector<vector<pair<int,int> > > adj;
vector<bool> visited,in;
vector<int> cmp,st;
queue<int> q;
queue<pair<int,pair<int,int> > > pq;

int solve(int x,int n)
{
    int sz = 0;
    q.push(x);
    visited[x] = true;
    in.assign(n,false);
    while(!q.empty())
    {
        int p = q.front();
        q.pop();
        sz++;
        in[p] = true;
        for(int i = 0;i < adj[p].size();i++) if(!visited[adj[p][i].second]){ visited[adj[p][i].second] = true; q.push(adj[p][i].second); }
    }
    for(int i = 0;i < n;i++) if(in[i] and adj[i].size()<=1) pq.push({0,{i,i}});
    if(sz==1) return 0;
    while(!pq.empty())
    {
        int w = pq.front().first,p = pq.front().second.first,pr = pq.front().second.second;
        pq.pop();
        st[p] = max(st[p],w);
        for(int i = 0;i < adj[p].size();i++) if(adj[p][i].second!=pr) pq.push({adj[p][i].first+w,{adj[p][i].second,p}});
    }
    int ans = INT_MAX;
    for(int i = 0;i < n;i++) if(in[i]) ans = min(ans,st[i]);
    return ans;
}


int travelTime(int n,int m,int l,int a[],int b[],int t[])
{
    adj.resize(n);
    visited.resize(n);
    st.resize(n);
    for(int i = 0;i < m;i++)
    {
        adj[a[i]].push_back({t[i],b[i]});
        adj[b[i]].push_back({t[i],a[i]});
    }
    for(int i = 0;i < n;i++)
    {
        if(visited[i]) continue;
        cmp.push_back(solve(i,n));
    }
    sort(cmp.begin(),cmp.end());
    reverse(cmp.begin(),cmp.end());
    if(cmp.size()==1) return cmp[0];
    else if(cmp.size()==2) return cmp[0]+cmp[1]+l;
    else return max(cmp[0]+cmp[1]+l,cmp[1]+cmp[2]+l+l);
}
//
//int main()
//{
//    int n,m,l;
//    cin >> n >> m >> l;
//    int a[m],b[m],t[m];
//    for(int i = 0;i < m;i++) cin >> a[i] >> b[i] >> t[i];
//    cout << travelTime(n,m,l,a,b,t);
//}

Compilation message

dreaming.cpp: In function 'int solve(int, int)':
dreaming.cpp:23:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0;i < adj[p].size();i++) if(!visited[adj[p][i].second]){ visited[adj[p][i].second] = true; q.push(adj[p][i].second); }
                       ~~^~~~~~~~~~~~~~~
dreaming.cpp:32:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0;i < adj[p].size();i++) if(adj[p][i].second!=pr) pq.push({adj[p][i].first+w,{adj[p][i].second,p}});
                       ~~^~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 51 ms 6904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 51 ms 6904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 51 ms 6904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1080 ms 5360 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 51 ms 6904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 51 ms 6904 KB Output isn't correct
2 Halted 0 ms 0 KB -