Submission #522657

#	Time	Username	Problem	Language	Result	Execution time	Memory
522657		maco1503	Sightseeing (NOI14_sightseeing)	C++14	15 / 25	3566 ms	98416 KiB

sightseeing

#include <bits/stdc++.h>
#define rpd ios_base :: sync_with_stdio(0); cin.tie(0);
#define ll long long
#define fs first
#define sc second
#define pb push_back
#define mod int(1e9)+7
#define NMAX 500000 + 5
#define inf INT_MAX

using namespace std;

ifstream in(".in");
ofstream out(".out");

set<pair<int,int> >s;
vector<pair<int, int> > g[NMAX];
int dist[NMAX];
void dij(){
    s.insert({1,-10000000});
    while(s.size()){
        auto st= *(s.begin());
        int mini= -(st.sc);
        int nod= st.fs;
        s.erase(s.begin());
        for(auto x:g[nod])
        {
            int vecin= x.fs;
            int cost= -(x.sc);
            if(min(cost,mini)>dist[vecin]){
                s.erase({vecin,-dist[vecin]});
                dist[vecin]=min(cost,mini);
                s.insert({vecin,-dist[vecin]});
            }
        }
    }
}

int main()
{
    rpd;
    int n,m,q;
    cin>>n>>m>>q;
    for(int i=1;i<=m;i++)
    {
        int a,b,c;
        cin>>a>>b>>c;
        g[a].pb({b,-c});
        g[b].pb({a,-c});
    }
    for(int i=1;i<=n;++i)
    {   dist[i] = 0;
        sort(g[i].begin() , g[i].end());
    }
    dij();
    while(q--)
    {
        int x;
        cin>>x;
        cout<<dist[x]<<'\n';

    }
    return 0;
}

/*
4 4 2
1 2 10
1 3 30
2 4 20
3 4 5
3
4
*/

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 6 / 6
• Subtask 4: 0 / 10